PDF malware analysis — malicious · 825508d86840bb9e

MALICIOUS

PDF

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

MD5: 5bef7dfa7d4373587def1d2ae6966e09 SHA-1: 1441c073513c2fb3105aa99248a391acc2581fd0 SHA-256: 825508d86840bb9ee7bf8d3f8c887eddcea76ebfd199edb482fc3f2efe9168c5

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV with the signature Pdf.Exploit.Agent-36874, indicating it exploits a known PDF vulnerability. The presence of an XFA form and an AcroForm button with an action trigger further suggests malicious intent, likely to execute embedded code or redirect the user. No scripts were extracted, but the file structure and ClamAV detection strongly point to a PDF exploit delivery mechanism.

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` `73d086fad6e0e40c38089eae590232de92709747382c95f5359ce4bfd32d774d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1414 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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