PDF malware analysis — malicious · df196ce5f633b19f

MALICIOUS

PDF

12.7 KB

MD5: 366c39c047946e62620b3343d86b4eee SHA-1: 9b598d507fb801418d020283b7c24d1ed1d2bd05 SHA-256: df196ce5f633b19fe31e5dcb018a70317bf903cce273de9e501d91297392f7b6

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. This JavaScript is further obfuscated and split into multiple streams, indicating an attempt to evade detection. The primary function of the script appears to be downloading and executing a second-stage payload, as suggested by the heuristic firings and the presence of deobfuscated JavaScript files. The ClamAV detection also confirms its malicious nature.

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` `d9e916ffb1d10884059d26ff561d0c98d0ba3d1d620e8bf96c0e3cc68c0c6f6a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12306 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `3d9d804d04cc6f4e5397e080fb80723d3be84e25a5e453afb2ac4e60c97967f0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5123 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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