PDF malware analysis — malicious · 920f70b434f48113

MALICIOUS

PDF

1.6 KB

MD5: c712a31e6dc3ebc20195289f7c30f1f4 SHA-1: 5e915658f34653e008e3423fb8756ab855afbce8 SHA-256: 920f70b434f481134289495ccc156a44d7126bf1261725293562f255d8f03419

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical PDF_EVAL heuristic firing suggests that the JavaScript code is obfuscated and uses eval() to execute, a common technique for downloading and running additional malware. The ClamAV detection of 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature and obfuscation. The extracted artifact 'javascript_obj0009_000.js' is likely the source of this malicious JavaScript. The overall attack pattern is consistent with a malicious document used for initial payload delivery.

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` `0125b18da0db85f867a419e2eaf4dbcd8b5a19656b6c14d3dea3ced3b4313748`	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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