PDF malware analysis — malicious · a21e3e624ba8376d

MALICIOUS

PDF

12.7 KB

MD5: d08399e33f5ebc241bce40dc0429bd1d SHA-1: ae382c65eadb6147ccaea6cd37a6fee980e7ee69 SHA-256: a21e3e624ba8376deacf7a7e9b7e780ad8b13be2117bd1c4fe96128efce940de

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF file contains embedded JavaScript that exploits the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. The heuristics indicate that the PDF launcher concatenates and evaluates JavaScript, which is further supported by the presence of deobfuscated JavaScript files. This suggests the file is designed 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` `5105139edab2dfc8d7ed553d52cc1146ea98b1f1e10052124eeb9b3187fb00d6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12766 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `79c21f6889fb68174951dc41b46d7c6447dcf3f40d5bc4c458beb1b616a17be1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5205 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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