PDF malware analysis — malicious · f4e6679c4cefeff0

MALICIOUS

PDF

13.0 KB

MD5: 287dc27784161c566d76866bdaffd11f SHA-1: 1e5b1dde8c7d841fcee7ec27ee450d6ef4e7f7ed SHA-256: f4e6679c4cefeff0f4bacaef9f5c62e6e9bbc3762d2ae44a52d7ac3dbb3be88b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically identified as exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. Heuristics indicate the JavaScript is obfuscated and likely part of a multi-stage exploit chain, with extracted files named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' suggesting further deobfuscation or payload staging. ClamAV also detected this as Pdf.Exploit.Agent-36062, confirming its malicious nature. The primary attack pattern involves leveraging this exploit to execute arbitrary code, likely for downloading additional malware.

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` `6b9e3715aadc8c2411cc3743f2d83280d037195dd8d90b8773557f9803a31031`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12619 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f7cd6ac9bd24e28b83dc961a7b1d2197c3ff8023d728bc7709a3454cb8570495`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5280 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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