PDF malware analysis — malicious · e4c753e21d5d71ee

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: 46532f633ea592b788b2de2b62c0de50 SHA-1: 3061aa1d442c734289ee13003f97af81738df506 SHA-256: e4c753e21d5d71ee760e59f130eedbb7e05dde8bbb1f3b133ebf0842d7589624

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains embedded JavaScript that is triggered by the OpenAction. The JavaScript utilizes eval() and String.fromCharCode, indicating obfuscation. The critical CVE-2007-5659 heuristic firing confirms the use of a known vulnerability to execute arbitrary code. The script is designed 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)
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` `21cbc190b4571b47e4ccba9885d2507c4f9a04b9d54a0e3c565e21cbb2074c42`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	14011 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` `b33d3de4edd9561206daf7db411e6f7bf3fd28fc6109cefab1e920a090a560a7`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4260 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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