PDF malware analysis — malicious · 32a4635268cf9109

MALICIOUS

PDF

7.0 KB Created: 2009-09-11 19:42:02 Authoring application: Eblasha 1.4.9.7 (via PDF Library 6.2.8.9)

MD5: 79cda126f747910a22edbed5b72e5592 SHA-1: 95f30baf889490dcf358a9295c1e00a5e9fac3ec SHA-256: 32a4635268cf910930528f4c009485040e9bfe73cfe134752c77f02b44dcd0b2

136 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 suggests obfuscated JavaScript code is being used to execute arbitrary commands. ClamAV detection as 'Pdf.Dropper.Agent-7246716-0' further confirms its malicious nature. The primary function appears to be downloading and executing a second-stage payload.

Heuristics 8

ClamAV: Pdf.Dropper.Agent-7246716-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7246716-0
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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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` `a8029ad0dd1c1d8485c7d80a4c663a5c59f4327ae857547cd4fe4fb3fd9d3683`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36B	21316 bytes
`javascript_obj0015_001.js` `db988e2f65b5e797747c86e921e3e3d61f74d9455b26665d16bbc8370d14a2df`	pdf-javascript-stream	PDF /JS object 15 at offset 0x17D8	175 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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