PDF malware analysis — malicious · aaf227367165036f

MALICIOUS

PDF

11.9 KB

MD5: 2cb7e6085bbe04a48170b292fc3a8010 SHA-1: 79eb500cfba75d5a73cef27b8ea17d71ef9e9ff7 SHA-256: aaf227367165036fcfb194d9445771045ab4a329935dada61dfab3a70d7cc381

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that leverages the Collab.collectEmailInfo function to trigger CVE-2007-5659. This JavaScript is designed to download and execute further stages, indicated by the extracted files legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The primary attack vector is the exploitation of a known PDF vulnerability.

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` `f52bafd971c81e0d9fc852127d94e4a4e9d06570f7c284682cd2fcb19285149c`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	4991 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` `d74a347ff03578117c9ad767ebf0a410ebed577aeff72b338d4649b167fb9cf5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12024 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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