PDF malware analysis — malicious · 7c336d6667e212a7

MALICIOUS

PDF

5.1 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 52914301af5b5980f32ebf437b4843fc SHA-1: 3b31cf37bc552cb708257761e0091bf9053dbdeb SHA-256: 7c336d6667e212a717f5ec0600ac368460ffa051653aee64eba8977b12ece9c2

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript that is heavily obfuscated, indicated by the 'PDF_EVAL' and 'PDF_FROMCHARCODE' heuristic firings. The presence of 'javascript_obj0013_001.js' and 'acroform_b64_00.js' further suggests the execution of malicious scripts. The primary intent appears to be the execution of obfuscated JavaScript, likely to download and execute a secondary payload, which is a common technique for 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_001.js` `3c012d308eab22ad4f2d8f4bf893e9c81c4448fcb4eda8c45499ce82a6363742`	pdf-javascript-stream	PDF /JS object 13 at offset 0x369	6613 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` `f2e2c9d0ef170870b546f2103cdb39877faec1436a3dbe55c49984323ae57be0`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x725	4279 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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