PDF malware analysis — malicious · d908a706c2a2d2fc

MALICIOUS

PDF

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

MD5: d6c25ebe411022bf2b216d4b1d090abf SHA-1: 7bc6be73195601a8e80d2e66aab9460390b9024a SHA-256: d908a706c2a2d2fc5a70027e23abd7be67ac827c018a8b78e9747bb688798135

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The file is a PDF document identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36874. Heuristics indicate the presence of an XFA form and an AcroForm button with an action trigger, commonly used in PDF exploits. The ML classifier also strongly flagged this PDF as malicious. While no specific script was extracted, the combination of these indicators suggests the PDF is designed to exploit a vulnerability, likely to download and execute a second-stage 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` `7251602adee1d5978710895f10688aca5177ff252a4dfec64cd36e47ec747d2f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1396 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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