PDF malware analysis — malicious · b3630d675bd23514

MALICIOUS

PDF

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

MD5: 8370b00a3a62db67cd5a4279235430be SHA-1: 2be2a3359b66bfc9eb06fdd57ba4faf9c37091b8 SHA-256: b3630d675bd235145cce7015551e3693c48db4d872c0b220aac449812a7852ac

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The critical ClamAV heuristic firing indicates this PDF is recognized as a known exploit, specifically 'Pdf.Exploit.Agent-36874'. The presence of XFA forms and AcroForm buttons further suggests an attempt to leverage PDF features for malicious purposes, likely to trigger an exploit. While no specific script was extracted, the file's structure and the ClamAV detection strongly point towards a malicious PDF designed to exploit a vulnerability.

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` `371c83448436e3d88f38531186dd8a87dd73c08417a1b4dc958eb7efee3a9a7e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1421 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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