PDF malware analysis — malicious · 2810f017ef54928f

MALICIOUS

PDF

9.1 KB

MD5: 00826a11aa308c77df0b6e138785bfed SHA-1: 2a772f25e4ac0c6ebbd84524d24618ea0f54ade9 SHA-256: 2810f017ef54928fbb7c0882fb2458cc9baa9b898d3da8389e06aab622b532be

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated and utilizes the unescape function. Heuristics indicate exploitation of CVE-2007-5659 via the Collab.collectEmailInfo method. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection signature 'Pdf.Exploit.Agent-35905'. The document body is unreadable binary data, providing no contextual clues.

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-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 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` `b8efe15635def9bc2148b4fde21bbdfbeb4015a95bf6fdd8ef6c0c7563c370d2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11528 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4731a2980d2e005abeb6fe9d7228f3244a1bcac0faf3d71f9f01742860ef6807`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4805 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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