Pdf.Exploit.Agent-4046 PDF malware analysis — malicious · d7c985aea3368808

MALICIOUS

PDF

3.5 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 01853ff24f832b7a92943bf557e2b7cf SHA-1: da814fe019f77c07ab52e3b61b3a98177fac5360 SHA-256: d7c985aea3368808efac8f3af14d206f48b3a374e8654b9cff08c4f5e30e4a2f

226 Risk Score

Malware Insights

Pdf.Exploit.Agent-4046 · confidence 95%

MITRE ATT&CK

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

The PDF file contains embedded JavaScript triggered by the OpenAction, which is a known technique for exploiting PDF reader vulnerabilities. The critical heuristic CVE_2007_5659 indicates the use of a specific exploit targeting the Collab.collectEmailInfo function. The embedded JavaScript, identified as 'numeric_charcode_stage_000.js', is likely responsible for downloading and executing a secondary payload, as suggested by the 'eval()' call and 'String.fromCharCode' usage within the decoded stream.

Heuristics 8

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-4046 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-4046
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `cfc68f9d54ed0ae7164c59bf68d5654c4c61071ffeba0ea9902610532fd54357`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13733 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `de601840f57302d25627fc06f6a94e52e19e2f076353a80b328f949c1cae10c8`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4104 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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