PDF malware analysis — malicious · ce1698001751e808

MALICIOUS

PDF

75.0 KB Created: 2010-03-12 20:18:46 Authoring application: eKBWJO4b6UrV (via BFLBoZz)

MD5: 3d499c364ccbe3621fe8d86bdb8e4f87 SHA-1: 8d853bb15efa7362efffaec6bee57fed5a2bedb7 SHA-256: ce1698001751e80803c0a1e0ff030bde4ce3b3c90794677fd2ccca0526b2c36f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is heavily obfuscated, utilizing String.fromCharCode and eval() calls, which are flagged by PDF_FROMCHARCODE and PDF_EVAL respectively. This obfuscation suggests an attempt to hide malicious code, likely designed to download and execute a second-stage payload. The presence of a large extracted JavaScript file (javascript_obj0007_000.js) further supports this. Due to the obfuscation, the exact nature of the payload cannot be determined with high confidence.

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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `cbca16d5fbdcfda19f36f8dfbf1c1815498b32add16c9e926d78345cd907943a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23C	75554 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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