PDF malware analysis — malicious · 9bf51ec60c303f13

MALICIOUS

PDF

12.5 KB

MD5: afbb79c5269df5c940b66554db236b71 SHA-1: 7dd417b1129558448b3e292ce70703f57e11ceb5 SHA-256: 9bf51ec60c303f13bf4fb0af7fc998e3819d4784382d7938f0ac5a1caa79610c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. The heuristics indicate that this JavaScript is used to launch further stages, likely downloading and executing additional malicious content. The presence of deobfuscated JavaScript files further supports this analysis.

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` `bcdc7fbdf94ec955c627375ebf814bbdef4ef638bde94c7376e0fe78307a21cd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12289 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `cae45e05173bb1ba68754fbf768991e95085792d84c277d4e7f302739a408d34`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5069 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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