PDF malware analysis — malicious · a15ec1d0a3bcfb4a

MALICIOUS

PDF

3.1 KB

MD5: dc13d49869e10aaa7ea2204931ea4fb7 SHA-1: dcb548932c2408deddd2abc3ecafcd00cceacfd0 SHA-256: a15ec1d0a3bcfb4a146cc2c96bafd680f6127e966d2198d7b135bbd168eeef5b

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as Pdf.Dropper.Agent-7288430-0. Static analysis revealed embedded JavaScript, including the use of String.fromCharCode, which is often employed for obfuscation. The primary function of the embedded JavaScript appears to be downloading and executing a second-stage payload, as indicated by the 'Suspicious extracted artifact' heuristic. No document body text was available for analysis, but the presence of JavaScript and the dropper classification strongly suggest a malicious intent to compromise the user's system.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7288430-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7288430-0
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` `b4b3a947a369185d2bc708439574b9ec5bc6f9d631847e9e3728a796f333a467`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	21641 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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