PDF malware analysis — malicious · ee19a5dcabb72e3e

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: fecbf005b0cf233c83c3c5fec15500ba SHA-1: 00749e20322b2183d69a7ee2e09d204744beb6c5 SHA-256: ee19a5dcabb72e3e4cfc1f6b338a37d94e389bc8edb7cc1f669b8e35d9bbb266

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell T1559.001 Component Object Model T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript that is triggered by the OpenAction. Heuristics indicate the use of eval() and String.fromCharCode, suggesting obfuscation. The critical CVE-2007-5659 firing points to the use of Collab.collectEmailInfo, a known method for exploiting PDF vulnerabilities to execute arbitrary code. The script likely downloads and executes 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` `42a63253d53711369623904e010a09ade8606dd367d6ec5c6e33a9548b0c90f6`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13391 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` `e3b48888b9e454066a32c82d47abd629880881c0e5c3527b403adc55a9c6b1fd`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	3996 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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