PDF malware analysis — malicious · 577aef3df76e5298

MALICIOUS

PDF

2.8 KB Created: 2008-11-05 14:52:07 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 8920008c47b1118232f5d921ff1a765b SHA-1: 86d5898d817a1fd9d92361e0fa32b1f2d961ee61 SHA-256: 577aef3df76e5298c5c65a3c74dabf4db0c7364671ee864cc7d902fb30c3cb64

158 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, and utilizes the unescape function. A critical heuristic identified the CVE-2007-5659 vulnerability related to Collab.collectEmailInfo, indicating exploitation of a known PDF reader flaw. The embedded JavaScript stream, named 'javascript_obj0013_001.js', is suspicious and likely responsible for downloading and executing a secondary payload.

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. (matched in decompressed stream)
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` `1c5b684c1991594f3fdbd6f76b42736fb9f9ec68c3ea32e03bf8a44380e9a185`	pdf-javascript-stream	PDF /JS object 13 at offset 0x364	2787 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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