PDF malware analysis — malicious · f86f9143d2e7c423

MALICIOUS

PDF

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

MD5: a8dad209a857069f5a90db6fbc72af90 SHA-1: 3096a019cc6b7133c32f54a195f90a24a01e9b61 SHA-256: f86f9143d2e7c4233694c3a545ed902cd3b48e3303efae9e9ab06b72ca9378a6

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The file was flagged as malicious by a machine learning classifier and ClamAV with the signature Pdf.Exploit.Agent-36874. Static analysis revealed it is a PDF with XFA form elements and an AcroForm button with an action trigger, indicating it is designed to exploit a PDF vulnerability. The ML classifier's high confidence score further supports this assessment.

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` `e7d633c15ebc9346c95a9a6b9e0664f455335e7940c4cb3c1e5689a5f261856c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1442 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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