PDF malware analysis — malicious · 235fbf46253a30f2

MALICIOUS

PDF

12.1 KB

MD5: a63fc056684ea64ad710b0c09a14d2ee SHA-1: c3a8a0071e76337075e3a0404e51e8f5e35967d7 SHA-256: 235fbf46253a30f2614fe6a3baf2e7d37a07aea3966bcc8a695a11deccdb29be

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1559.001 Component Object Model

The PDF file contains embedded JavaScript, which is triggered by the CVE-2007-5659 vulnerability. The JavaScript is heavily obfuscated, but the presence of multiple obfuscated JS streams and the ClamAV detection indicate malicious intent. The primary attack vector appears to be the exploitation of a known PDF vulnerability to execute arbitrary code.

Heuristics 6

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-36079 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36079
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `ef8bdac794684ae9cd4eb7091d80e1c5ca478c06c639d72d01626c1f7ce78b6d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	578 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `933aaf96bd707c073195dd522d33094b82e810ce4834d1bc54ee81d9b1047715`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12574 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `97f7f05a4b844f0c32cf8d41be6d1ad1f13a3af3500ebcc8430debcbc0de73c9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5176 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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