PDF malware analysis — malicious · c2b2213ebcf67302

MALICIOUS

PDF

3.4 KB Created: 2008-12-08 20:01:54 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 6602d16ed445c9597ef52e051a451e30 SHA-1: da20deb62d2f56a88010e1b9d627eccce17e2965 SHA-256: c2b2213ebcf673024765049e59452a9943fc89343ba269270008905af8ac6a38

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_FROMCHARCODE firings suggests that the JavaScript is obfuscated and uses eval() and String.fromCharCode to execute arbitrary code. This pattern is commonly used to download and execute a second-stage payload. No specific family could be identified, but the techniques used are consistent with common PDF-based malware delivery.

Heuristics 5

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_000.js` `d35a370958c886593529480cbfe8845e2fbbc1ea4495efe1956dfe7491601dd6`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	7140 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `75e1395cb4262ceece1c78e41aa30bb0f04d4de2eb7ea30ca968dae0180edf2f`	deobfuscated-js	PDF JavaScript deobfuscation pass	16076 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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