PDF malware analysis — malicious · cdb2104312890f45

MALICIOUS

PDF

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

MD5: 734c2b10fc614a9c0dfa3e9160e317c6 SHA-1: 510aaede250e66488e220569bb2053730bcb154a SHA-256: cdb2104312890f456666e25224938232a9ad85e64d111ca43d13eef08beb5a84

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The file is a PDF document identified by ClamAV as Pdf.Exploit.Agent-36874, indicating it contains an exploit. The presence of XFA forms and AcroForm buttons with action triggers further suggests malicious intent, likely to leverage a PDF vulnerability for code execution. No scripts were extracted, and the document body is unreadable, but the ClamAV signature and PDF structure strongly point to an 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` `5ec78e27b1919f600f4e9665d87c4b1c1f8e7c287bbe8de85d6c2326fe1f6325`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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