PDF malware analysis — malicious · 7e66221a8e30b770

MALICIOUS

PDF

136.8 KB Created: 2011-09-08 05:03:17 Authoring application: FPDF 1.6

MD5: dc052f1b43793cdb448bb68f1e19df4f SHA-1: e6ac506f459137cd4eaa170a477f11f1841444a2 SHA-256: 7e66221a8e30b770cae6cbd3b6c8a6ad70d2987dfe3bdb937f5f36349165f3de

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution

The file is identified as a malicious PDF by ClamAV and a machine learning classifier. The presence of an XFA form and an AcroForm button with an action trigger suggests an attempt to exploit PDF vulnerabilities. An embedded artifact, a decompressed PDF stream, was also flagged as suspicious. The ML classifier output of 0.999296 strongly indicates malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36874 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36874
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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
`stream_001_off000008ed.bin` `d31e0dd3e64411aee30e70e99dced9ee2ae6eb447be7b47d1c9b8834e8ddd7d5`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1455 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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