PDF malware analysis — malicious · 9c8d8a51f254abc3

MALICIOUS

PDF

12.0 KB

MD5: d16b5aac6e717182a5a838478d899a01 SHA-1: 09032696ad7147ca39cc5d587b859352980186d7 SHA-256: 9c8d8a51f254abc326017e222286b9196ee9f3f068e4ff99cd88dac339f91c9e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically indicates the use of JavaScript via the Collab.collectEmailInfo method, a known exploit technique for older PDF readers. This JavaScript is likely responsible for downloading and executing a secondary payload, as suggested by the extracted JS files and the ClamAV detection signature 'Pdf.Exploit.Agent-36062'. The exact nature of the payload cannot be determined from the provided evidence.

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` `1a5a3396adaa554e33845df28bc404587d875af17b1be40542590b50e95807de`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11844 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `42bf2eb1064b69e2bcef47d3df93ca8ee2b1b308de1be41fc75098721cd1efd4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4909 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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