PDF malware analysis — malicious · af4d7b43b6d26aa0

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: a4b44875ba7bcbb8418cd5b39f7cf6b8 SHA-1: 16b0f3434c9f9cc96a2cd383ae335421b63e692b SHA-256: af4d7b43b6d26aa05c0f7d71e7acd33045ab963b8927808187eb58a3caf86905

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF document contains embedded JavaScript that is triggered via the OpenAction. The JavaScript uses the unescape function and exploits CVE-2007-5659 (Collab.collectEmailInfo) to execute arbitrary code. The primary intent appears to be the exploitation of a known vulnerability to gain code execution.

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` `8ca8e483bb155b83dda28393c2a619cc73d102be614c56c2d13820cec940573b`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	34 bytes
`javascript_obj0013_001.js` `caf59cf95e94b8515b5b4cd0f1fec14a951bd5e670f4b75c2a5a82e5575ef215`	pdf-javascript-stream	PDF /JS object 13 at offset 0x379	2518 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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