PDF malware analysis — malicious · 828edf3320e289b5

MALICIOUS

PDF

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

MD5: 74359c1d59d739848a474d8fc49c3f8b SHA-1: fbc52f91d07dc2737b38f5e0d4bc4f896684b3ab SHA-256: 828edf3320e289b5e6bcdd98dcdee2e52cc4f3514134c5f0c5516888086bb9ac

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 with action triggers further suggests an attempt to leverage PDF features for exploitation. While no specific script was extracted, the file's structure and the ClamAV detection strongly imply it's designed to deliver a malicious payload upon opening.

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` `4830875a9f26f9bfd1f3248084e20d2651c7f44ad66c80133d5fe8f7e74c01e0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1434 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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