PDF malware analysis — malicious · 560b2a58091d82da

MALICIOUS

PDF

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

MD5: ab78707e03d4e45dd885cde2b7f472cc SHA-1: f85f9833a424cf6a8c11edbef2f9278a5b783c15 SHA-256: 560b2a58091d82da017abdc3fd02c64b44bcb3a6daef8dac3c88a8c71d621f20

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically detecting it as 'Pdf.Exploit.Agent-36874'. The presence of an XFA form and an AcroForm button with an action trigger suggests an attempt to exploit PDF vulnerabilities. An embedded binary artifact was also extracted, likely containing the malicious payload.

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` `02dec7f59f4cb09c9cc41d856a44cd5f305529cb63d15089a67aa00fceb43839`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1476 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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