PDF malware analysis — malicious · d5f833ed4e7453e2

MALICIOUS

PDF

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

MD5: e23d0fa118919d94ef989d85c1f2de03 SHA-1: 4c379392367bad44258f01d475cf4b30f790dede SHA-256: d5f833ed4e7453e214ce421ab97cb1b1ed011d72d25e5941f63e2b4feaa2e379

110 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The file is a PDF document identified as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Agent-36874. It contains an XFA form and an AcroForm button with an action trigger, indicating it is designed to exploit PDF vulnerabilities. The presence of a suspicious, long encoded blob within an embedded stream further supports the exploit vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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` `e342713593712f3d2a1975c1df3b582fa6916303c199e087a9d44e2fcdc809db`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1435 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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