PDF malware analysis — malicious · 34639f21d01d957c

MALICIOUS

PDF

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

MD5: 717d384d04257352f00c3195bd9b1d7f SHA-1: 97b1997f0d994cf1865ad81478039c68b66667a3 SHA-256: 34639f21d01d957c5c816d49661c23476facf889af7e98b5e6cdadf55c4e5ef4

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF file contains embedded JavaScript triggered by the OpenAction, which is a common technique for exploiting vulnerabilities. The critical CVE-2007-5659 heuristic indicates the use of Collab.collectEmailInfo with decoded JavaScript, suggesting an attempt to exploit this specific vulnerability. The presence of obfuscated JavaScript streams further supports the malicious intent, likely to download and execute a second-stage 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)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0013_001.js` `ac8ce5592fd6e4b10a6bba7e62aaaa7a231e11953e463e94513db0930575b854`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13289 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `91890a2f5989b3a418bf1196d1fb0389934419e62dc49e92c8bb1ec843e71021`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4032 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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