PDF malware analysis — malicious · a4fee7c104c330fc

MALICIOUS

PDF

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

MD5: 011054fac82dd8b6ed3293f85e6ecc85 SHA-1: 68dade04fa83732161041afbca1b74843b54ed02 SHA-256: a4fee7c104c330fca9124549f975404719947d2d7b23594f7d8fdd3819bca5ad

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains an exploit. The presence of XFA forms and AcroForm buttons suggests an attempt to interact with the user or trigger embedded actions. The extracted artifact 'stream_001_off000008ed.bin' is a suspicious component that likely contains the exploit code or 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` `499454cbaf91268f0c82d63bf756860bb6bf498389352e67d512e91b1ef77651`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1432 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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