PDF malware analysis — malicious · a0f77f6d302944b9

MALICIOUS

PDF

12.8 KB

MD5: c72e47fb0c74ecfdbd38687c95227864 SHA-1: 0d311b035ef8e6aad8e08702f146f7995699ed95 SHA-256: a0f77f6d302944b9cb1641c2e00636d14e70558c257529801ccf67ea526472ad

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: JavaScript T1190 Exploit Public-Facing Application

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, specifically using the Collab.collectEmailInfo method. This JavaScript is further obfuscated and split into multiple streams, indicating an attempt to hide its malicious functionality. The primary goal appears to be the execution of this script, which is designed to download and run additional malicious code, as suggested by the presence of deobfuscated JavaScript files.

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` `57c69b444cd88cc241b3af58b67b404bd40080b2c059758d655dfbf8d65e31a2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12596 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2ae8c045350834d422ac9522bc831eece661382d09d8d7e5a1732821a4bdf778`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5213 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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