PDF malware analysis — malicious · 3f21ac682d1789f4

MALICIOUS

PDF

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

MD5: 539ecec5ad3cbea8b1290602d0d50ecc SHA-1: ff226b91f70593eefa0a105078ea6d1bf08367f7 SHA-256: 3f21ac682d1789f4da84d37ef77e67bb770f1dd9ae657ed3633f52e6aecce8b3

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1559.001 Component Object Model Hijacking

The critical ClamAV heuristic 'Pdf.Exploit.Agent-36874' strongly indicates a known PDF exploit. The presence of XFA forms and AcroForm buttons further supports the likelihood of a malicious PDF designed to exploit viewer vulnerabilities. The extracted artifact 'stream_001_off000008ed.bin' is a suspicious component likely involved in the exploit chain.

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` `d3a6f7176ace0edde8bb649d2d8e6b1e248eedd9149e069b428aa90a1ba1cc96`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1379 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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