PDF malware analysis — malicious · 55558d15716345c7

MALICIOUS

PDF

2.7 KB Created: 2009-27-11 11:30:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: b4c8877441fbb38feb1f3cfdc0d1316f SHA-1: e9b0409ef0a8e298a5f80217e5b3639c148880be SHA-256: 55558d15716345c71c2f6af376fbe274cfb69f6462cffa379560a8bd30e99f89

218 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript triggered by an OpenAction, indicating an attempt to exploit vulnerabilities upon opening. Critical heuristics indicate the use of CVE-2007-5659 (Collab.collectEmailInfo) and a ClamAV detection of Pdf.Exploit.Agent-4198. The embedded JavaScript stream, named 'javascript_obj0013_001.js', is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

Heuristics 7

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. (matched in decompressed stream)
ClamAV: Pdf.Exploit.Agent-4198 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-4198
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `ad0e19f71f918dcc4a6898df31c56e0ba3b4454ae38894716f23db4784a5f2cc`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	3600 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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