PDF malware analysis — malicious · c64c5258975b13de

MALICIOUS

PDF

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

MD5: 6de9b660aa847dc26180946ecd7f7817 SHA-1: 8149e63476a0e8429cbd40a807337dfa742b35e1 SHA-256: c64c5258975b13de842d23c59ff5fc0a03a81547f75c1d522ea1bdede7a59a0b

78 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The critical ClamAV heuristic firing indicates this PDF exploits a known vulnerability, likely targeting PDF viewers. The presence of an XFA form and an AcroForm button with an action trigger further supports this, as these features are often abused in PDF exploits. No scripts were extracted, and the document body was unreadable, but the exploit signature is sufficient for a high-confidence assessment.

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` `b41289d491e9e7b9858cd8f76e272c3e68f0856196ac872e063d0fc78187ef21`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1513 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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