PDF malware analysis — malicious · c87faaa74d5bb33a

MALICIOUS

PDF

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

MD5: 0c501d8dc16035b706c197da88fcf6ac SHA-1: 1281feab217b58e36df4500c911b2e558bb7a0a0 SHA-256: c87faaa74d5bb33a31d449021c4c06263b289b14792baf62a2dc111fa9dbb25f

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File

The file is a PDF document that has been flagged by multiple detection engines, including ClamAV as 'Pdf.Exploit.Agent-36874'. The presence of XFA forms and AcroForm buttons with action triggers suggests an attempt to exploit PDF vulnerabilities. The ML classifier also strongly indicates maliciousness. The primary attack vector appears to be exploiting a PDF vulnerability to execute arbitrary code.

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` `917b595419474e2d9238e7a1333b61275646a1118550783843c3ad6039c5f2c6`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1464 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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