PDF malware analysis — malicious · f6740e101cc28d6f

MALICIOUS

PDF

7.9 KB Created: 2009-09-08 19:44:19 Authoring application: Eblasha 1.7.10.5 (via PDF Library 7.6.2.4)

MD5: 89db2cde4ce9de75c146e9d69e16f7b3 SHA-1: 0c09b720c65f16544467e4da205703aa1612e827 SHA-256: f6740e101cc28d6f91f88b5e484a6a0efb58ae077360913c7756711f5dde7c40

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The eval() call and String.fromCharCode usage suggest obfuscated code execution. One of the embedded JavaScript files, 'javascript_obj0015_001.js', is small and may contain the primary malicious logic. The exact actions of the script are unclear due to obfuscation, but the presence of these indicators strongly suggests malicious intent, likely to download and execute a second-stage payload.

Heuristics 6

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)
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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` `454e35468e75a73a2cdaa52b1fde6d712565abcb0e328b941ab2641d579f0f5c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	21392 bytes
`javascript_obj0015_001.js` `d7266f003a8250ae21f4007ffc07d4138b73422e6f5a1844fd4532005e63a7e8`	pdf-javascript-stream	PDF /JS object 15 at offset 0x1B99	214 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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