PDF malware analysis — malicious · 81574b735cccf7db

MALICIOUS

PDF

1.95 MB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: 65b49ba566b9b8e463bdf8c2604ecfa2 SHA-1: 07469c094cd15fd1c4041014db50cd484d2cc13e SHA-256: 81574b735cccf7db4b0438ad9ad4148d291eff47ba95a3e88ddd2c8290a0421b

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file triggered critical heuristics indicating it is a dropper, with ClamAV detecting it as 'Pdf.Dropper.Agent-7277457-0'. An embedded JavaScript stream was also identified, which is commonly used by such droppers to fetch and execute further malicious content. The extracted artifact also received a ClamAV detection of 'Win.Trojan.Agent-36166', reinforcing the malicious nature of the file.

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7277457-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7277457-0
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `0565c3e3598d93807bde5bdb617a54a2e43d419f6978d76b434ae99710339456`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75234 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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