PDF malware analysis — malicious · 4b6d161ca3e68f33

MALICIOUS

PDF

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

MD5: e9f8dacc48130227652eaab0652ff550 SHA-1: 00c8ba6cf67fbe08f12a0948c9d4e79dd35cc8ff SHA-256: 4b6d161ca3e68f336c2744b9f3ec02779b7b14471752d045db83da3f8702ad3e

110 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The critical ClamAV detection and high ML classifier score strongly indicate a malicious PDF. The presence of an XFA form and an AcroForm button with an action trigger are common techniques for exploiting PDF vulnerabilities. The ML classifier output of 0.999329 further supports the malicious nature of the file, likely delivering a second-stage payload.

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` `c7384d95ebcbfe0692d27cfabbd0621b0175632ff57235b61f146c641a26cf77`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1424 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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