PDF malware analysis — malicious · fa886e1ecfa18746

MALICIOUS

PDF

11.9 KB

MD5: 30daa1039a4993bfcf4dd681797bb447 SHA-1: dac761b3a7ad1da28b62f7e1225939d3d1725e02 SHA-256: fa886e1ecfa187467b77ba6d07fd9987ef45a78ada067523fac8d086e5853cb4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, identified by the CVE-2007-5659 heuristic, which is designed to exploit a known vulnerability in Adobe Reader. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are indicative of a multi-stage attack. The primary function of the script appears to be downloading and executing further malicious content, typical of a downloader or initial access exploit.

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `d50c82e3c741cfdcb87f2209a865b2e9d5f026fe8e0984c7f44aad5587d743f0`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5006 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `0faac086ff0a4a01da1aab723dd33066e2af2315b4ae98c13ec5fd34db422066`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12055 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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