PDF malware analysis — malicious · f9646710f5925338

MALICIOUS

PDF

9.7 KB

MD5: 8df8263a61a9a3917363aa1e2cd3305e SHA-1: 99cf6afc7ee5b323a74ab4d4cf4d473fbaba471c SHA-256: f9646710f5925338bf4e1a6bf0a286dfc96b04d72f7cc6e235fc1830d277b586

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability through the Collab.collectEmailInfo method. This exploit is designed to execute arbitrary code, as indicated by the ClamAV detection 'Pdf.Exploit.Agent-35905'. The JavaScript is heavily obfuscated but the core exploit mechanism is identifiable. The file's structure and the presence of multiple JavaScript streams strongly suggest it's a malicious PDF designed to compromise the user's system.

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` `ee6379b263d6951b76de89b214ca27fb3e81da986ea942eab594e1d38434428b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12309 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` `b29e69c883390d568c7a89ae45ec63aee230ac0f0e5a3225057752022b8fd5e2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5222 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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