PDF malware analysis — malicious · 8f1a4f5559fcb452

MALICIOUS

PDF

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

MD5: 688f5d27b9b9ee5eae7ccb5fa1abdc80 SHA-1: 562a7d9cf84567198852a3b894b0ca5f0d3686b6 SHA-256: 8f1a4f5559fcb452274705d616591b1ceb98257819b3f6101d23e549fdf3a7cc

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that is triggered by the OpenAction feature. The JavaScript utilizes eval() and String.fromCharCode() for obfuscation, and specifically targets the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. This indicates the script is designed to execute arbitrary code, likely to download and run a secondary malicious payload.

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. (identified after JavaScript deobfuscation)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Suspicious extracted artifact high 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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `42e30fb476a68204e7880079d56dfee79212a6f04d298d9e6ca8c271acfe4540`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	14265 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `ef4f5b8e072830e514a6865325f8faf3576389e5e0e464046ef92e9bb44dfb22`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4272 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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