PDF malware analysis — malicious · 95aa6cb9c441e176

MALICIOUS

PDF

3.0 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 70fc2560274643bde0d00fcc03c2b415 SHA-1: cc1a7f0023b424a5e9439cdd9e8f9b0c78526dc5 SHA-256: 95aa6cb9c441e1762c5a1b1b367fc174ca26a7e2571459f1041ce92c2e6cfe4d

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file contains embedded JavaScript that is triggered by the OpenAction feature. The script utilizes unescape() and calls to Collab.collectEmailInfo and util.printf, indicating exploitation of CVE-2007-5659 and CVE-2008-2992. These actions are designed to execute arbitrary code, likely to download and run a secondary payload. The file was authored using Scribus, but the embedded exploits are the primary indicators 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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (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` `bb469eb3487dfe55be86aaa16df29cfad8dcf67ca88bba8521315cde6d228a87`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	4178 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).

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