PDF malware analysis — malicious · d8ae63d1547a3a6c

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: 498afdedcbeaf49c525ebfd0855f4bd0 SHA-1: 5e6cef67f3e589d3c390519e91e00d5debe5e7a2 SHA-256: d8ae63d1547a3a6ce4d0fdb1ed3aa103ab6061fdcf8e3697dd8a07e9981426b3

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF document contains embedded JavaScript that is triggered by the OpenAction feature, a known method for exploiting PDF vulnerabilities. The critical heuristic firing for CVE-2007-5659 indicates the use of a specific exploit technique involving `eval()` and `String.fromCharCode` to deobfuscate and execute malicious code. The extracted JavaScript streams, particularly `numeric_charcode_stage_000.js`, likely contain the logic for downloading and executing a secondary payload, although the exact URL or payload could not be reconstructed from the provided evidence.

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` `a0c8466ab804c993a3f5527cc3fc3925bebc1dca08df5032c02549955783a068`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	14227 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` `a26e1fdaf238da0fa654a376c34e5afd5ba0ea47b45349a5298d4449a904de59`	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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