PDF malware analysis — malicious · a4fdecfeebf7c957

MALICIOUS

PDF

12.3 KB

MD5: 0cfad850746709b4cd36cd0dd3759d4d SHA-1: 86e5e5110b4f236fc026c467f15c037677cacdd1 SHA-256: a4fdecfeebf7c957bf3830813077429fa39daa935ceff39d32c509fe4a84ab0b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic specifically mentions the use of 'Collab.collectEmailInfo' for JavaScript execution, suggesting an exploit attempt. The presence of deobfuscated JavaScript files further supports the execution of malicious code. The overall attack pattern involves leveraging a PDF vulnerability to run scripts, likely to download and execute a secondary 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` `205fda80aad8492691cb658fcc6a07081f5f8e48c80db0803d8492ca0acbfee0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12078 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `fc78f266c0a6afedd932905614a1f6d5ed4bd168e64d53546e622634747e3b87`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4944 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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