PDF malware analysis — malicious · f9714947dd0488f9

MALICIOUS

PDF

12.4 KB

MD5: a8022e585cc0985762cd3f266a8f3347 SHA-1: ac2ed08950954e45441eed3e0708974e629d40c2 SHA-256: f9714947dd0488f9658c0ff32c4001d4b90d0756a57e78646ed31c0cb0dbd2b9

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV (Pdf.Exploit.Agent-36062). Critical heuristics indicate the exploitation of CVE-2007-5659 via the Collab.collectEmailInfo method, which concatenates info fields and evaluates the result. Deobfuscated JavaScript files were extracted, suggesting a multi-stage attack. The exact payload and execution flow are not fully discernible due to obfuscation, but the exploit chain is clear.

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` `df81bd9651e7f19a9c49e6c626a79dddf33e292003c970c7be2b974ec4ac1833`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12139 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9698dde0f9a6682405bf2d4e0efd0a831dd6be7046d9c960c2f22f01af20b486`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4991 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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