PDF malware analysis — malicious · a665bbb238b01c18

MALICIOUS

PDF

7.9 KB Created: 2009-09-11 19:41:14 Authoring application: Eblasha 10.10.6.8 (via PDF Library 3.5.4.4)

MD5: 672ed1a3c56b1d53440adbc43cceb8dc SHA-1: 06715f45b9cb38ee57dbbd4ec5b910878336fbc7 SHA-256: a665bbb238b01c189d398f121b262080ba89e738fd3e34ccc31bcdf6a1bb81c0

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

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 designed to execute. The primary function of this script appears to be downloading and executing a secondary payload, as evidenced by the suspicious extracted artifact 'javascript_obj0015_001.js'. The PDF structure and JavaScript execution point towards a malicious document designed for payload delivery.

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` `0bf98433be9c178b8e2bc8a29a4d150e17e84f4c6add0fff0186421796887f65`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	21220 bytes
`javascript_obj0015_001.js` `1760ad03848efc2d18ba4bad7e2a25a4b20ecd49b0216d1cedc37efba1d4adab`	pdf-javascript-stream	PDF /JS object 15 at offset 0x1B7B	172 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.