PDF malware analysis — malicious · 3c101a36458b8596

MALICIOUS

PDF

12.7 KB

MD5: c26a52796c20c3fbcafd7d7a10fefb8e SHA-1: 0a244be52d058a9ede19e49ec38447352c5a006d SHA-256: 3c101a36458b85967be846136ae408b314da75e3ba854655a683ce8b32e8a2b2

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the CVE-2007-5659 heuristic, which leverages the 'Collab.collectEmailInfo' function. This function is known to be used in exploits that execute arbitrary JavaScript. The presence of deobfuscated JavaScript files suggests a multi-stage attack, where the initial PDF likely serves as a dropper for further malicious activity, such as downloading and executing a second-stage payload.

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` `42dcf1f6cb42dc90d9e6bdcd3acd598095ed2837da044944102edffa4c7d0949`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12453 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `801a545bffe5238dcbb61d0ec317530b41cf6966fd38975d188f54e4e69fcaaa`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5099 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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