PDF malware analysis — malicious · 5782d181fabf9924

MALICIOUS

PDF

5.4 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 8e857930a958ad30c6bf31bd607e6b9b SHA-1: df8b5d50bc7c761c4fe66999a90ac606945ffc80 SHA-256: 5782d181fabf9924d5afa5fae85ebaa3960481be05c60908a529aa37f473e0a3

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes `eval()` and `unescape()` functions, indicating obfuscation and potential malicious code execution. Critical heuristics identify exploitation of CVE-2009-0927 (Collab.getIcon) and CVE-2007-5659 (Collab.collectEmailInfo), which are known PDF vulnerabilities. The presence of a secondary embedded PDF with similar suspicious findings further supports a malicious intent, likely to download and execute a second-stage payload.

Heuristics 8

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
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)
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.
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `e0168bbf61d2d39a0d5edb35f1134457438820bc4d3129d2582506ca195290ba`	pdf-javascript-stream	PDF /JS object 6 at offset 0x80E	146 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `9abc7e1f6736795c172049566a3fec4e1d8016f737b256b56477504c2d8b7ef3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x16E	2695 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`polyglot_child_pdf_off00000ac5.pdf` `5a3118df963bbad651d737d749be56b5751a29e5103f957f2f85a1f334de4a0d`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0xAC5	2757 bytes

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