PDF malware analysis — malicious · 3f181f31837bc2d8

MALICIOUS

PDF

12.8 KB

MD5: 198a1d7390ae91cfa674e5b6c42169ec SHA-1: c0b5a00721c538a041581abb1f64d9367945459c SHA-256: 3f181f31837bc2d8bd95b0cb3f03b7af3676d69fd53dcbaffdafcd2543aa30fc

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo) to execute arbitrary code. The heuristics indicate that this JavaScript is used to deobfuscate and likely execute further stages, as evidenced by the extracted JavaScript files legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. This points to a typical exploit delivery mechanism for a multi-stage attack.

Heuristics 5

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)
ClamAV: Pdf.Exploit.Agent-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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_obj0007_000.js` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `2791ddfbc1632bc3bc2ee597c1936f380e92099c3f5c4ea3b9dfc2d0db360929`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12575 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ecbb2ad8555e705104a962eb4ecd33dea38dbd20a848ca6816d333f47e9cbd2a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5185 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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