PDF malware analysis — malicious · 34d0690cdbe32285

MALICIOUS

PDF

2.7 KB Created: 2009-10-07 10:03:35 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: f89f9095122559dd1f3ede1f036d4f83 SHA-1: acf3c1576f5ed4708d60f62ecb84a88dbb4a534a SHA-256: 34d0690cdbe32285049d76cc1bea84af692ac40d4b453eff3ae6bc36af9452b1

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 the OpenAction, which is a common technique for exploiting PDF vulnerabilities. The presence of `Collab.collectEmailInfo` and the `unescape()` call strongly indicate the use of the CVE-2007-5659 vulnerability. This exploit is designed to download and execute a secondary payload, as suggested by the ClamAV detection name 'Pdf.Dropper.Agent'. The extracted JavaScript stream, though obfuscated, is indicative of malicious intent.

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.Dropper.Agent-7247922-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7247922-0
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` `2ca419e819631c051bcbcf7d37e3372745f7e3675de703115e3f89ef64234e80`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36C	2702 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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