PDF malware analysis — malicious · 827ca1f690c28bec

MALICIOUS

PDF

2.7 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 80bacb43fcb3bebe1a9a8a67db94f7ce SHA-1: 6d86355fb3b81d36a3b45c1d700782230e1d0d42 SHA-256: 827ca1f690c28bec0512bd488db2361b342e229ca86e39f9fdcf56f5d2cfeaec

158 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file triggers an OpenAction upon opening, which executes embedded JavaScript. The JavaScript stream contains obfuscated code that utilizes the unescape function and is associated with the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This indicates the file is designed to exploit a PDF viewer vulnerability to run malicious code, likely downloading a second-stage 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` `50b18456597ceef203b6c931fec1fad488820d7c55769a2976fd8448093a7881`	pdf-javascript-stream	PDF /JS object 13 at offset 0x363	2782 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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