PDF malware analysis — malicious · e18a25268f2d2224

MALICIOUS

PDF

1.88 MB Created: 2006-11-07 11:38:03 -07:00 Authoring application: Adobe Illustrator 11.0 (via Deep Exploration 5 5.0.3.1555 Release)

MD5: 70ec662f6918c8089f8ac7c2e6f7cdb4 SHA-1: 592188be888869cd6c8a98ca760f26eae94b1a40 SHA-256: e18a25268f2d2224690ae7f45b0b85bd964ceb09f071dcfa972eb92ad417e013

174 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link T1071.001 Web Protocols

The PDF file contains multiple indicators of malicious JavaScript execution, including eval(), unescape(), and String.fromCharCode() calls within decompressed streams. The presence of U3D/3D content, flagged as CVE-related, suggests an exploit targeting PDF viewers. The obfuscated JavaScript likely aims to download and execute a secondary payload, indicated by the embedded script payload heuristic. No specific family could be identified due to the heavy obfuscation.

Heuristics 10

U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/g/img/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/

Extracted artifacts 29

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0222_000.js` `f95e60cb4fb1fc42730d5ce790cdd02a6f481bdf65ae9c39b50b3591044c6360`	pdf-javascript-stream	PDF /JS object 222 at offset 0x38193	188595 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_033_off00025da9.js` `83f0e3117230a4942827ef354efb831d505f83a1546ceb7cbd336b12cb2a5942`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x25DA9	22212 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_034_off00026e46.js` `f8b13a3863af702dcd7e3941443dec10025d7a2a53f54e108dfaf2b8e3f2695f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x26E46	17918 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_035_off00027c1a.js` `67fdedd6cb9a0e0b6e0eaba2f238ca5c983512f99a2092d586e4edea586be475`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x27C1A	10626 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).
`stream_039_off0002a375.js` `e268c3fa8753a7b53b3db467a54c42b8f9036543a6f7b6d4f1d02ccd59df16d3`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2A375	7253 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_040_off0002aaed.js` `77066a7a37b3af6ad53791d7f9457b7dfed3a8d84d4feaa7031d8ae355636408`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2AAED	2855 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_041_off0002af12.js` `a1069b624d829f9ed15ef9dc70c98d2a23233bb0b080385f34e121a533ca365a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2AF12	10387 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).
`stream_045_off0002d3a4.js` `09a1f6366bade2c781cbaf923095ea7085f8de7adb3a8c0b0b708123787b545f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2D3A4	7240 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_046_off0002db2b.js` `962623957d02896ce50ac303e11139789b7c547ef6f635834872fbf3a740a5c4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2DB2B	2629 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_047_off0002df38.js` `252ea1aa6e45985d77ac5ab2582980690ed57e9f198ae81a80a56806c03a8ae3`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2DF38	10231 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 8 eval/decoder/string-building token(s).
`stream_049_off0002f7b0.js` `9796998ca2c32756bf181ff5f4a60580d6fd55561b2050ddebc355d20055f667`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2F7B0	7036 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_050_off0002ff25.js` `2a7255a2847947efcf8ff75cb73e57c1238de0b56ef725e3acb574238a620505`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2FF25	2680 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_051_off0003033c.js` `34e199a7c93f33d1bb6f18620c86cff5d7bc5c68e1809e942ed0f3c0dc1515f9`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3033C	10563 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).
`stream_053_off00031685.js` `12da33232a02682161413374f6f05c0210833edfde1a8ef6373b058eab29c831`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31685	7349 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_054_off00031e2f.js` `e35d38f817cd62db5a1f4554fb99f1e4ac0bd5e7e17c19dc1ad0afd56261c2cd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31E2F	2699 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_055_off00032242.js` `f99b25026b97bbf0ee754128febcbd6731b4870a0b207a825858361537edb519`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x32242	10656 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s).
`stream_057_off0003350e.js` `f61d6d78585bf688bcd9976ab48d95b3ceeff76f145e26142d53f0c3f6f91422`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3350E	7516 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`stream_058_off00033cb9.js` `835ae1930debae0ff9f45f4d3af42c9838d14fc0ce7262bdf9b42f507a2f12bb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x33CB9	2623 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_059_off000340c9.js` `0d67705a6bb1b0b689ce8dc5c8e2647f9ac5b389b7b962dac06623e78c805ec9`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x340C9	10376 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 8 eval/decoder/string-building token(s).
`stream_061_off000354ce.js` `f1b809fcabd36a7b044d90b6113a89fff86070ac264f8499b1c49f20c8e11036`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x354CE	7139 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_062_off00035c6c.js` `8cf818474745e275d3a361ee51a325ca2da34fa2d6266b93bd6469334fb63052`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x35C6C	2719 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`stream_063_off0003608d.js` `edf99511724f2fa86783da015818f61810939ca447b807b0b8c274f911c20ef9`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3608D	10455 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s).
`stream_065_off0003733e.js` `0e39b508c23e49751ef8144517c5ab068efcd2c2e8347b74a648b3adeb7cf172`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3733E	7219 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_066_off00037ad6.js` `575b0ab544d9a1d0fd5b4052fc85e291b9e65138e37005f64035bcb6a2a084bd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x37AD6	2721 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_069_off00042bd1.bin` `1b0458135e41a2cf3dffd7abfa0eb75881ba74e1b498192a706cc7ba2a1e80d9`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x42BD1	4171480 bytes
`stream_070_off001b1f4a.js` `293e87bad017638b7a9abe516b617a4baabdee4dce16511a4d1238c1e0dd2409`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1B1F4A	151320 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`objstm_0233_00.bin` `130a52f1c2559f13a74c282db98c237ff20dc8dc8276adbb12e70b0069473cac`	pdf-objstm-decoded	PDF /ObjStm 233 0 obj (inflated)	525 bytes
`objstm_0234_00.bin` `50b8be7bcb0faeedcd653bd9fa39aaf66c2575814701a52e34458519eff5fb58`	pdf-objstm-decoded	PDF /ObjStm 234 0 obj (inflated)	3792 bytes
`font_00_sfnt_off000010bf.bin` `f39f99e2d4b021d4eac703afe26d32ad26f128c442f2089910c21b1f323fc85d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BF	79301 bytes

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