PDF malware analysis — malicious · d77f196114a31ede

MALICIOUS

PDF

272.8 KB Created: 2009-05-11 10:08:39 +03:00 Authoring application: Adobe LiveCycle Designer ES 8.2

MD5: 35cd657d082d855b6662f433626d01e7 SHA-1: bba33b80acb8347813fa4e537bae04a2cfeaf09c SHA-256: d77f196114a31edef031705ee34d81335b804c3bc4b342e23d3ac6d77a256eaa

122 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains embedded JavaScript and a SubmitForm action, indicating an attempt to interact with external resources. The presence of an embedded script payload and the use of unescape() suggest the execution of malicious code. While the document body is unreadable, the heuristics point towards a downloader or exploit delivery mechanism. The embedded file 'embedded_file_obj0010.bin' and the JavaScript file 'javascript_obj0207_001.js' are likely components of the malicious payload.

Heuristics 10

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
SubmitForm action medium PDF_SUBMITFORM

PDF has a /SubmitForm action — form data can be silently posted to an attacker-controlled URL
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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/xap/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/
- http://ns.adobe.com/xfa/promoted-desc/
- http://crl.adobe.com/prodSvce.crl0
- https://www.adobe.com/misc/pki/prod_svce_cps.html0
- http://crl.adobe.com/cds.crl0��~�|�z0x1
- http://ns.adobe.com/tiff/1.0/

Extracted artifacts 20

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `dc5340ca6b8faa6e248a740e920df7c0eb2bd05e99bdb59be07b72db43557153`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x1FA4	162 bytes
`embedded_file_obj0009.bin` `606d512836d3eeec7f64a82d49963e8a0c0e609a462440dfb0a441983d6b9ae2`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x2093	2226 bytes
`embedded_file_obj0010.bin` `d6e376e98576f857784df370e74358e4e5740db25f90fef09817d69015230b7f`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x243C	60203 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`embedded_file_obj0011.bin` `8cc670d8d2f8fc6f4f0ebb1794bca1ba2e56b946a3f546d9b64c97b97d6104e7`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x45EB	2967 bytes
`embedded_file_obj0012.bin` `86b509487430fe2684e4c72fc9e0a07cc57145983a916b237d13a384b6b32322`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x496A	871 bytes
`embedded_file_obj0013.bin` `ca28a4c9a405031892afb9851e38dcdc3db5b47daca8773a021830cd791c1216`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4A59	1535 bytes
`embedded_file_obj0014.bin` `2ebdd7efeaa1190ff6bad8cbd649b313e3969564018f204e7385b97c2fab1e19`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4D1E	80 bytes
`embedded_file_obj0015.bin` `81dd4e4a7f54fef2f09b8de7ee71036db7ea020657b0d07cc7fab7e4482af11d`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x4DC9	233 bytes
`embedded_file_obj0377.bin` `fa7ad477d12c8e6ea4200dd528a03d0cff54efc2a694ac5eeb4f5eb65208ad51`	pdf-embedded-file	PDF EmbeddedFile object 377 at offset 0x3FBCF	1887 bytes
`embedded_file_obj0378.bin` `4bd65eafcdb262e6a7eb278af3ae4be7b1a9ca650f86f4c6a2d2afd621c3700b`	pdf-embedded-file	PDF EmbeddedFile object 378 at offset 0x3FD94	1814 bytes
`javascript_obj0196_000.js` `4a3be1c97fa660c78458adbf8467d9ef0ece4b4be6574ddb6a76861e566be29f`	pdf-javascript-stream	PDF /JS object 196 at offset 0x94DD	999 bytes
`javascript_obj0207_001.js` `134dcea3245a20a641ef7275cb3bef9d6455db27e7caac2bd70f3663f8b3b24f`	pdf-javascript-stream	PDF /JS object 207 at offset 0xB646	11503 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0208_002.js` `f94e41f586bf3f20bc1deeac4bfbda388a61db43f25fbd6304ba73f5653368cf`	pdf-javascript-stream	PDF /JS object 208 at offset 0xBFAD	1313 bytes
`javascript_obj0209_003.js` `1b2ec98752b966f601d5223a750559cf13d562ac5e5c6d1fcc7217835b01f5fd`	pdf-javascript-stream	PDF /JS object 209 at offset 0xC18F	902 bytes
`javascript_obj0210_004.js` `826c5622c798d67e5281cca7e05933dddc90ccdcb0a6177c9f7d06f11bef8f7f`	pdf-javascript-stream	PDF /JS object 210 at offset 0xC2ED	2795 bytes
`font_00_cff_off00000937.bin` `87f6821ea7e5d41d56f8cc2a939bb40ac9487c6df45bf2376e6adbc768081f58`	pdf-font-stream	PDF embedded font (cff) at offset 0x937	3907 bytes
`font_01_sfnt_off00012890.bin` `c29e5b1537bee8c88b3ffca56c5f24a45ec8da374cf9d4c0b4a78d04fc230949`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12890	95975 bytes
`font_02_cff_off0002479e.bin` `25316e6ef10fae455d1fcf7c92093ea2df713d3b40f605eecd85b19811c47a57`	pdf-font-stream	PDF embedded font (cff) at offset 0x2479E	6013 bytes
`font_03_cff_off00026129.bin` `e7ba48e2b8c5bace9783e2b6d2ca0e14b1f7e0d0461106328735597ec4e6e906`	pdf-font-stream	PDF embedded font (cff) at offset 0x26129	10178 bytes
`font_04_cff_off000288c1.bin` `ffa5ec5d4b5102547c14deba45374e016cb7342407dbd297fcafd421ec30b280`	pdf-font-stream	PDF embedded font (cff) at offset 0x288C1	8997 bytes

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