PDF malware analysis — malicious · 4457c6bb2d0388f2

MALICIOUS

PDF

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

MD5: 2b477c02cef58a4d965b149311f495f2 SHA-1: 41439eb900b0b3650a2b6140b6a8563c5f751868 SHA-256: 4457c6bb2d0388f29c4b23cc9ad6209d50f0b2fb121b5d20f63626d1b193fc33

160 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript and is configured with an OpenAction trigger, indicating an attempt to automatically execute code upon opening. The critical CVE-2007-5659 heuristic firing, specifically related to 'Collab.collectEmailInfo', strongly suggests the exploitation of a known vulnerability in Adobe Reader. This exploit likely leads to the execution of the embedded JavaScript, which is designed to download and execute 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `b75608d557107ef8a2d071aa3218fb1d7891ba52e0bbbd9516248b21111bb241`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	34 bytes
`javascript_obj0013_001.js` `d25bc4c6aca7eafe7bb82d8766322872626752991abd453c5a68a747f4902e90`	pdf-javascript-stream	PDF /JS object 13 at offset 0x379	2411 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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