PDF malware analysis — malicious · 75813f9fcac33a49

MALICIOUS

PDF

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

MD5: 4a3e1af611a0040e52e112126601b75b SHA-1: 2fbc3ca13e2f0953c995a839fd0bb700445bee74 SHA-256: 75813f9fcac33a4927d2952a6e21131628cfca07c9682241152b387c3a1c0848

78 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36874, indicating it exploits a known PDF vulnerability. The presence of XFA forms and AcroForm buttons with action triggers further suggests malicious intent within the PDF structure. The extracted artifact 'stream_001_off000008ed.bin' likely contains the secondary payload.

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` `4a0a18932b0204cd45813a1d4867536835628d7735487d9aeee1bb5eab3106d3`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1446 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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