PDF malware analysis — malicious · fc4c1bd4cc6d4aa9

MALICIOUS

PDF

11.9 KB

MD5: a5e694f8c3c0d2118505fa13db5a0206 SHA-1: 1c873b5cbf5d163ccb2e6bad8698b873e47a3e3c SHA-256: fc4c1bd4cc6d4aa9ab27fdd896c82d55baad95a3c304f51c4c013497b00976b1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, specifically targeting the Collab.collectEmailInfo function. The heuristics indicate that this JavaScript is used to download and execute a second-stage payload, as evidenced by the extraction of two deobfuscated JavaScript files. The ClamAV detection also confirms its malicious nature as a dropper.

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.Dropper.Agent-7327866-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7327866-0
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` `425968ace0353f19975cebdabcc3d89bc5c5ad5b247db8c52d367df093523fc5`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5044 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` `b324db6d6f484a6a9ceadfb96385663f3ba07616ed4076698788182cfc310edb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12039 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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