PDF malware analysis — malicious · ec2dde9f893ccfe7

MALICIOUS

PDF

3.5 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 6cd815bd76338f3b291abc02cd89b352 SHA-1: ee3d6e16dd971b6cec8568c6e32ba5b873272156 SHA-256: ec2dde9f893ccfe7aadd3460769109f0a57ffc177b60fa855a386962986c4c3d

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the `eval()` function and `String.fromCharCode()` to deobfuscate and execute malicious code. The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a known Adobe Reader vulnerability via the `Collab.collectEmailInfo` method. This suggests the primary goal is to achieve arbitrary code execution on the victim's machine.

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. (identified after JavaScript deobfuscation)
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_000.js` `40ef1bba967e70622124bf39fc2956f9b3926807b622db3889870ce340e830b5`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	3454 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `da3bf5ca0e0443e5195cc14efede6789605f62d65335c2463e79a58afbe7f028`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x40B	2223 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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