PDF malware analysis — malicious · aa0cb397a3f322d7

MALICIOUS

PDF

9.7 KB

MD5: 47076c7b6059190e58730dda09e9db18 SHA-1: 1be9ae5715b53a8e27e26ecdb4801d63591fa4f4 SHA-256: aa0cb397a3f322d7424923c23d7422795150c3472e0444cab92c316785496375

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This exploit is designed to download and execute a second-stage payload. The obfuscated JavaScript streams and the use of eval() and String.fromCharCode() indicate a deliberate attempt to hide malicious activity. The primary attack vector is the exploitation of a known Adobe Reader vulnerability.

Heuristics 6

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `4b0cff18c2dcdfd7215e707649b33f5a5effd5fc75c7f3d9e7cc42cbcf648139`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	299 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` `884187dd1afef777c1d2d8806219cc883695d6ce54826d51839408c7cfea41a4`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x30B	5254 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `9879f81a2d9b2ca400d9fec5d9ebee3d5d55de0a0b28c9ca037dca7c2113437c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x30B	12379 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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