PDF malware analysis — malicious · a2cb2be0b1f77b51

MALICIOUS

PDF

1.6 KB

MD5: 22e9c6944be6b88824066644ee5a475c SHA-1: b56c616dffdc41deaaf1ac1b13b70ee41ed37412 SHA-256: a2cb2be0b1f77b517c6c8e82ce8a1e474b6a54ec573297eb823b6308bc2bb738

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by multiple PDF-specific heuristics including `PDF_JAVASCRIPT`, `PDF_JS`, and `PDF_EVAL`. The `eval()` call and `String.fromCharCode` suggest the script is designed to decode and execute arbitrary code. The embedded JavaScript file `javascript_obj0009_000.js` is likely responsible for the malicious payload delivery. The ClamAV detection `Heuristics.PDF.ObfuscatedNameObject` further confirms the malicious nature.

Heuristics 6

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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)
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_obj0009_000.js` `7077a9a280389f7ab1bd4ae9a792bac1e20a55bf0c9a6411af6a9223f686b788`	pdf-javascript-stream	PDF /JS object 9 at offset 0xDC	3898 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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