PDF malware analysis — malicious · 5aa47aa1f17d7413

MALICIOUS

PDF

99.4 KB Created: 2005-01-28 08:58:53 +01:00 Authoring application: Adobe Illustrator(R) 8.0 (via Adobe PDF Library 5.0)

MD5: 97c28e4635fdaa495258db79812ab13b SHA-1: 518b15ed414f33548f5b7a8484acf23fc58f94ae SHA-256: 5aa47aa1f17d7413165e973a88fa0ba09278d34db5f787a1f006f9d8389021c6

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded JavaScript streams, which are flagged by heuristics as an exploit cluster. The JavaScript is obfuscated and likely designed to execute arbitrary code, potentially downloading further malicious content. The presence of JavaScript actions and exploit-related heuristics strongly suggests this PDF is a malicious document intended to exploit vulnerabilities for client execution.

Machine Learning

Nyx PDF Classifier malicious score 0.5445

Heuristics 6

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
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)
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/mm/
- http://purl.org/dc/elements/1.1/

Extracted artifacts 19

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0073_000.js` `99db10c8cdc5577e5eb0859e0e521b252c5a2f0f7ba60dacd54eff92acabf8eb`	pdf-javascript-stream	PDF /JS object 73 at offset 0x24F6	2984 bytes
`javascript_obj0074_001.js` `a05e9ef61f1d614748ce1cacd2e72c31a7c9a3a874531099d730545673feeba6`	pdf-javascript-stream	PDF /JS object 74 at offset 0x262A	2079 bytes
`javascript_obj0075_002.js` `9d1645fef471163426f2178924ce9338e159b5612407dda27fc8139e63e40fb4`	pdf-javascript-stream	PDF /JS object 75 at offset 0x2919	6740 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0076_003.js` `5c4f00c69a59aff02a35f97de664d0603e5d4b449c72889d2a4d27c57bc88c39`	pdf-javascript-stream	PDF /JS object 76 at offset 0x30D7	15928 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0077_004.js` `26ca0c06013da4577a675c2e788a7b01643ea33d235af17fe822fe5d98559f8b`	pdf-javascript-stream	PDF /JS object 77 at offset 0x421C	13505 bytes
`javascript_obj0078_005.js` `5e5d7bb32b96d444601e0a0156c1dcc68a0655dbe30a6e12f3eba2344a8c884e`	pdf-javascript-stream	PDF /JS object 78 at offset 0x4957	5970 bytes
`javascript_obj0079_006.js` `54c5f9e1eb38a601cd5d54886da574f56fa753743aa1d72ee6daa22b3c30bb11`	pdf-javascript-stream	PDF /JS object 79 at offset 0x4F8B	6615 bytes
`javascript_obj0080_007.js` `d550cd9a1c20316750d0833a59c64d34dff8fa11b4dd1981f17e1c7dbcccd608`	pdf-javascript-stream	PDF /JS object 80 at offset 0x5625	5078 bytes
`javascript_obj0081_008.js` `c81781e069c478026463bd399d01d20f6bd40e603b9d8c303fd8ba85f2407f68`	pdf-javascript-stream	PDF /JS object 81 at offset 0x5CA9	16697 bytes
`javascript_obj0082_009.js` `9c200c85e5e2fd5706f6f0058531517f80ed3f1501decaf2a47cc3ce7d1f11b6`	pdf-javascript-stream	PDF /JS object 82 at offset 0x6BB7	1077 bytes
`javascript_obj0083_010.js` `c77183bd8accd7d989d1f1b0321ace604c99d056dcd04359567237b5d034cc66`	pdf-javascript-stream	PDF /JS object 83 at offset 0x6D73	2511 bytes
`javascript_obj0084_011.js` `e2bf54728d0a99f59983ddbfbea08c3e63ace8177e43dfd0744059d41669f423`	pdf-javascript-stream	PDF /JS object 84 at offset 0x7138	4436 bytes
`javascript_obj0085_012.js` `6486d8e7bdd85daeb1149849986e6f0d9a21317557d894d853fda355b859a596`	pdf-javascript-stream	PDF /JS object 85 at offset 0x7816	9809 bytes
`javascript_obj0086_013.js` `f2e83c4bcae264587e6ff71d984fcf34a1fc02cbaccb4c4a5f030a060cf0ba0c`	pdf-javascript-stream	PDF /JS object 86 at offset 0x835A	1012 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`font_00_cff_off0000c09a.bin` `a71412d1640a3ea803bd8797ed1fec615d6540574392f9e498290984f6c1dda1`	pdf-font-stream	PDF embedded font (cff) at offset 0xC09A	6300 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.43, consistent with packed or encrypted content.
`font_01_cff_off0000db95.bin` `64f358cba53f01533db892f920293a87cc59a4c46404d33bad32acbaa45df461`	pdf-font-stream	PDF embedded font (cff) at offset 0xDB95	2921 bytes
`font_02_cff_off00010d53.bin` `b4cbb5d30691e5990fe8409f43e0a87591f8c0ab96b7fd2475778c1c15d512c1`	pdf-font-stream	PDF embedded font (cff) at offset 0x10D53	753 bytes
`font_03_cff_off000158dd.bin` `0b317363f72e8eaa3c5261bcec06de94493475d6a06f095505ce568a19c7e8df`	pdf-font-stream	PDF embedded font (cff) at offset 0x158DD	548 bytes
`font_04_cff_off00015c4b.bin` `7960e93bff494b7e95631aa800b1868c14ce1e160eaa24e01288468d0413bad8`	pdf-font-stream	PDF embedded font (cff) at offset 0x15C4B	177 bytes

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