PDF malware analysis — malicious · fb6bde55cc959a13

MALICIOUS

PDF

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

MD5: d4249e0062709b1545ea5fcff6cae05e SHA-1: 662b79aeddeb39b217867255140a62aee3639eed SHA-256: fb6bde55cc959a13eef7bf4cf18332e1a56c463302222ff8c1d81d97c2d82344

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The file is a PDF document identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36874. Static analysis revealed the presence of an XFA form and an AcroForm button with an action trigger, indicating potential exploitability. The ML classifier also flagged this PDF with high confidence. The embedded artifact suggests a potential 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` `ada04fb3f2aabe5e2409d540197e34fa8514a970f3dc81f93eb3f5f1e54882e2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1421 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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