PDF malware analysis — malicious · 8539daea9aee6c02

MALICIOUS

PDF

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

MD5: 5d358ef09d87120f8ad38ab26f841af8 SHA-1: 0f68f46a0df3259a8c87a318a0ace6660d3aa21e SHA-256: 8539daea9aee6c025252e3b1a3463b836cd7a9ad8ffdf5aa2ed9f08c1c9bce93

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link 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 further suggests an attempt to embed or trigger malicious actions within the PDF structure. The extracted document body content is heavily obfuscated and does not provide clear user-facing text, but the overall structure points to a malicious exploit delivery.

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` `82e3b6ea7d216b3be0aef297ab014bf9bb78ab7259620424c947fd5a1a29935a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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