PDF malware analysis — malicious · 557450311adb2486

MALICIOUS

PDF

32.5 KB

MD5: ed0d438003e489e1b3b6e6dd6582ea6c SHA-1: 2d5266a6f6b3c959aaf5aff8209516456ef4692e SHA-256: 557450311adb2486880cea7271f5e4eab74b2a6710db57d36fefc8011d088de4

256 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1559.002 Component Object Model Hijacking

The PDF file contains embedded JavaScript and a Flash object, both of which are flagged as malicious. The JavaScript stream, specifically, contains an eval() call, indicating obfuscated code execution. The embedded Flash object (YDEBpnMDnpD.swf) and the JavaScript file (javascript_obj0006_000.js) are the primary indicators of malicious activity. The ClamAV detection 'Pdf.Exploit.Agent-35955' further supports the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

Heuristics 8

ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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
`YDEBpnMDnpD.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x17DE	26774 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `b343bdd08929731189be940e84a0c7c6ce7c2a63c1055e392955b651cda9f5c1`	pdf-javascript-stream	PDF /JS object 6 at offset 0x144	4495 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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