PDF malware analysis — malicious · 782cb8732ebdb0c3

MALICIOUS

PDF

14.8 KB Created: 2009-09-24 19:48:65 Authoring application: PDF Library 2.4.3 (via PDF Library 9.6.8)

MD5: 77fe8fd336bc0115097fb624be81f1d6 SHA-1: 4d5f1c40bab13792b070b5c1bf091c06a22b9342 SHA-256: 782cb8732ebdb0c3f1e5c887fe794495579d6abcf9f28538c8820df6f4aefbbf

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ClamAV detection of 'Pdf.Dropper.Agent-7274491-0' strongly suggests its malicious intent as a dropper. The JavaScript likely attempts to download and execute a second-stage payload, although the specific execution chain is obfuscated.

Heuristics 8

ClamAV: Pdf.Dropper.Agent-7274491-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7274491-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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)
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `89dbd2e5abae9a298709f63569063dc4144e09f41ba669bf78349215df6ae219`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	139163 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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