PDF malware analysis — malicious · c16854015d8343cc

MALICIOUS

PDF

2.6 KB Created: 2008-17-11 03:37:53 Authoring application: rRZ4N (via rkxA)

MD5: 228e0df04b6341ffd1c351b41e110da0 SHA-1: dcd577f4d5e1b2aaf444f6de62b62529d842cd2f SHA-256: c16854015d8343cc3ab36b740bfb37383bb7d18d54c92f6460742882955716b2

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers an OpenAction, indicating an attempt to exploit a vulnerability. The critical CVE-2007-5659 heuristic firing confirms the use of the Collab.collectEmailInfo method, a known vector for arbitrary code execution in older Adobe Reader versions. The embedded JavaScript stream, identified as 'javascript_obj0013_001.js', likely contains obfuscated code designed to download and execute a secondary payload, although its exact function is not fully discernible due to obfuscation.

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` `e21a894e0b84296cc064a95bdf53ab443972a67a8dbf7f3681fcbcbce949dcd7`	pdf-javascript-stream	PDF /JS object 13 at offset 0x366	2790 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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