PDF malware analysis — malicious · 3e552bd3e5cb3791

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: 6fc0872b7426645f1b2c8c358a80280f SHA-1: 5d745116b5eda49be04b624223f4ad2f2864fdbf SHA-256: 3e552bd3e5cb3791e85b999aa8cb397fced76fed18f49bd3701a2574be9dcb72

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript triggered by an OpenAction, which is a common technique for exploiting PDF reader vulnerabilities. The critical heuristic firing for CVE-2007-5659 indicates the use of the Collab.collectEmailInfo method, often abused to execute arbitrary code. The embedded JavaScript, particularly the 'numeric_charcode_stage_000.js' artifact, likely decodes and executes a malicious payload, although the exact nature of the payload is not fully discernible from the provided static analysis.

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` `38cef54a39795e32578247761752443f5005b7d6790e56f5c1a11916627ce57f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13771 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` `52755e5e7adf16928b8c956eee2e6dad5a1f3bf1866c1e25327e883d724b006a`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4116 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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