PDF malware analysis — malicious · be9bec84c1c898c7

MALICIOUS

PDF

11.7 KB

MD5: 2b71a224ab0d0010fde9ee85a3ad04de SHA-1: 16207314be031a6c95d71858d210a474cc6e0ca2 SHA-256: be9bec84c1c898c7f7a39d1458a7e37e017e7423e8d3583b75143bc18106dcf5

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, detected by critical heuristics related to CVE-2007-5659 and ClamAV's Heuristics.PDF.ObfuscatedNameObject. 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 JavaScript appears to be downloading and executing further malicious content, exploiting the identified CVE. The presence of these stages and the exploit trigger strongly suggest a downloader or dropper functionality.

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` `a0b4c25bb1396d7e1a806794c46bd69003bb4fbde2ae9223de6d17c0388c183c`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	4938 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` `1c3eab6dd57df6375c748c4f3e6157648999ce8b9b5460afd357f77f853a2bd3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	11826 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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