PDF malware analysis — malicious · 53938569ede9bc1a

MALICIOUS

PDF

12.2 KB

MD5: e0f9e4b05dd3329dd65cd6d45d814da1 SHA-1: c439b1207a90cc21eb639ac2757e0d4e540ad98a SHA-256: 53938569ede9bc1aa5db875b6fea8fbc19a80ea8874b4eab82998eee6f5e48bf

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, specifically leveraging the CVE-2007-5659 vulnerability through the Collab.collectEmailInfo method. This JavaScript is further obfuscated and split into multiple files, indicating a multi-stage loading process. The primary intent appears to be the execution of malicious code via this exploit, as suggested by the critical heuristic firings and the ClamAV detection.

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` `ed5ed5f4160f3ced3688fb29b3eb3a017e20593f6291e135d7a161e9c89bb926`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11969 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9b020fb4b6e92b0ca872c44c93d3a6ce609ec053eeaccb61ba0f423cc9e46f35`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4919 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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