PDF malware analysis — malicious · 44481f254ad155f1

MALICIOUS

PDF

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

MD5: 63aca8263356aa97f7fe3e191bdc2a2c SHA-1: 4dc0260b79b8c622530c60c4885e80765dbb7d7f SHA-256: 44481f254ad155f16fe9c9654271a85e37e453a5d68d140372d841fbd38ccc5e

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Exploit.Agent-36874, indicating a known exploit. The presence of XFA forms and AcroForm buttons with action triggers further suggests malicious intent within the PDF structure. An embedded artifact, stream_001_off000008ed.bin, was also identified as suspicious. The combination of these factors points to a malicious PDF designed to exploit vulnerabilities.

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` `9e9b1509ae9b16d51062393e7f56bf843561cc48a89ccef54811b38b79b7b57c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1411 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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