PDF malware analysis — malicious · 2afb61f2bfb76264

MALICIOUS

PDF

28.5 KB Created: 2010-03-12 05:19:04 Authoring application: U7M4NkpFLk (via kGif4pTOC255hg)

MD5: 4df9d7788a070faad596ff917f658675 SHA-1: ccea567238362b15933871ec7d5dc1ad72ae9920 SHA-256: 2afb61f2bfb76264bb99eac0a17843137aba251d90f247b00a78c7e8f7ee64a4

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and a critical ClamAV detection for Pdf.Exploit.Agent-15419. The JavaScript stream utilizes eval() and String.fromCharCode, suggesting obfuscation to hide its malicious intent. The primary function of the script appears to be downloading and executing a second-stage payload, as is common with PDF exploits.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-15419 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-15419
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.
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` `80032dae634a56305e43d2e4aeaa4e1cf16df5815a34bc72a1c93745e30ac79f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x238	27967 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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