PDF malware analysis — malicious · 28028f2706b02fba

MALICIOUS

PDF

8.4 KB Created: 2009-04-09 18:49:13 Authoring application: HfqCVGzRhdYkHxu (via ozRHFkmqkNegyS)

MD5: d0d43b292b6e6d113502dd3cdd7045c4 SHA-1: abe6732cf8c2aaa899879165329d5fd403193af2 SHA-256: 28028f2706b02fbab744c17a840dcc1c1a563a356929a174e73be6e67396038e

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-35572' and a high ML classifier score. Embedded JavaScript actions and streams were detected, indicating the likely execution of malicious code. The ML classifier's high confidence suggests a sophisticated exploit is present, aiming for initial access.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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.
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` `25601d3afe9878ae3cb78f7a08f113a0b0e251e1bb2df8b6a5a8306b25056128`	pdf-javascript-stream	PDF /JS object 7 at offset 0x487	6701 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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