PDF malware analysis — malicious · a64a940e961896e4

MALICIOUS

PDF

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

MD5: 25146aa4144a1a0d4d7f74dcc9770075 SHA-1: 9959fd16e92602794eed9ac02ff5982058a67411 SHA-256: a64a940e961896e48d81661726a5126e84b1938e6dc07b4194310d0442dbb667

110 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The file is a PDF document identified by ClamAV as Pdf.Exploit.Agent-36874. Static analysis indicates the presence of an XFA form and an AcroForm button with an action trigger, suggesting an exploit is embedded within the PDF. The ML classifier also flagged this PDF with high confidence. The document body contains obfuscated text, further supporting the malicious nature of the file.

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` `7a99804abe9373ebbb84fa4a56a6e2561cc6f85db923cc7d305404c97b2e9e68`	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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