PDF malware analysis — malicious · a8c4e5164bf95a47

MALICIOUS

PDF

12.5 KB

MD5: a52c13f01e76646e2622109d75d7e57b SHA-1: 41e7ea0a188e349e2cd1e75bc91de01ea4ba9fd5 SHA-256: a8c4e5164bf95a4707435c8b42bd65ae74a4065ce176a103f340eaf3f6e05ea4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo function. This JavaScript is likely designed to download and execute a secondary payload, as indicated by the heuristic firings and the presence of deobfuscated JavaScript files. The ClamAV detection further supports its malicious nature.

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` `9ad8fb2f4a6a4f416799f0040b7c2be25a617d3d00e74c1a1fe5d156153be83d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12192 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `045e9c8e6cb3c7f79374780a74c7984ccd26a1a3c2d0b3902b0539234b44a459`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4979 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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