PDF malware analysis — malicious · 1a9eb6b47b7398b7

MALICIOUS

PDF

2.7 KB Created: 2009-10-05 11:03:11 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 0df279894e9a7229b1cb04152c59af91 SHA-1: 3bfce843d0dadd63905392946c5b97d9dab1e7a3 SHA-256: 1a9eb6b47b7398b752f1ee13785803c9ecf5cabc57d5167f1357b995d9c9eea6

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript triggered by the OpenAction, and uses unescape() to decode a malicious stream. The critical CVE-2007-5659 heuristic indicates exploitation of a known PDF vulnerability (Collab.collectEmailInfo). The embedded JavaScript, named 'javascript_obj0013_001.js', is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Pdf.Dropper.Agent' ClamAV detection.

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-7685767-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7685767-0
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` `2939086c6803b47496a99164e27e9517431d36c154ec54f3ca3ec86cb892d38f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36C	2732 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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