PDF malware analysis — malicious · 495ef626ba65ec36

MALICIOUS

PDF

28.6 KB

MD5: bb6e7c798e07c375c28de2126f84bcec SHA-1: e5381ce79103366a92fa4a776ee4a4cae08af075 SHA-256: 495ef626ba65ec364a971710d2f8fadc47be4bea74d21c9593b9793852fc3f56

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple PDF_JAVASCRIPT and PDF_JS heuristics. The critical PDF_EVAL heuristic firing suggests that the JavaScript is being used to execute arbitrary code, likely to download and run a second-stage payload. The presence of obfuscated JavaScript and the ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject' further support this assessment. The extracted JavaScript files are the primary indicators of compromise.

Heuristics 7

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
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.
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_obj0005_000.js` `c2bb7fede39eceef6bf65002820edd56bd9f292f0b84229e9c2265f0cec736bc`	pdf-javascript-stream	PDF /JS object 5 at offset 0x15C	28676 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `6cce7246e402d60376788a380ec3faec4033ce9d03e5d4a8f94ad0bd17cdeaf0`	pdf-javascript-stream	PDF /JS object 5 at offset 0x15C	61 bytes

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