PDF malware analysis — malicious · ad4a9791ddd660b6

MALICIOUS

PDF

11.7 KB

MD5: f8ac48fc205a27bef6ef687ba0b9ddae SHA-1: 754d0880b87ecd0a4551ec4dc1811eb450bf8601 SHA-256: ad4a9791ddd660b639b2985901d8abc36a973e4d3d3d4e8d0bb953397f292051

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the CVE_2007_5659 heuristic which specifically targets the Collab.collectEmailInfo function. This JavaScript is obfuscated and likely responsible for downloading and executing a second-stage payload, as indicated by the extracted deobfuscated JavaScript files legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. 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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `128880a5a6523edfe5b552618f315d26ae49ab104b30f020c37f4efefeebb97f`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	4931 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` `e7bec4dbe9e4438e6a437eaaf6437f10d9fc9c43f59a2084812d3e3d5e86c473`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	11829 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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