PDF malware analysis — malicious · e0ae9c2c36f0ebfb

MALICIOUS

PDF

3.3 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 200b3a1c38030196bc8a540b66146910 SHA-1: 193004f82ea4ba5e03cd22145aade08d8afc25a7 SHA-256: e0ae9c2c36f0ebfb4a854f530e1b0c5ccb8b984baf969dc92602233850f1406b

228 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that is triggered automatically upon opening (PDF_OPENACTION). The script utilizes `eval()` and `String.fromCharCode()` to deobfuscate and execute code, specifically targeting the CVE-2008-2992 vulnerability via `util.printf`. The presence of `javascript_obj0013_001.js` and `numeric_charcode_stage_000.js` indicates a multi-stage approach. The primary goal appears to be the execution of arbitrary code, likely leading to the download of additional malware.

Heuristics 8

util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-35384 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35384
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` `842364906841b1281631a436e58fbe2ecf9f26a1567efabae7a40e7a5dc70b17`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	7640 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` `5ab1790df813ead7c232131519396afe7e17e872390937ccd4efe4505fd2ffb8`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x42F	2208 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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