PDF malware analysis — malicious · b7a9cfa9bdebad64

MALICIOUS

PDF

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

MD5: 063cfeb50ec98c03e97506b235ed3499 SHA-1: cc37f052520b6dd9a31e31ce636b9dd309da0043 SHA-256: b7a9cfa9bdebad64932bd11a0d484c081bbd69c501067325cf93b4fe70920fc0

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV with a high confidence score, indicating it contains a known exploit. The presence of XFA forms and AcroForm buttons suggests an attempt to interact with the user or trigger an exploit. The embedded artifact 'stream_001_off000008ed.bin' is likely the malicious 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` `51d27ca6da1c180f218dddef09fcdf7cf354c6b971d3d89446bb977b49767c31`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1428 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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