PDF malware analysis — malicious · 2aa06300c7f08398

MALICIOUS

PDF

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

MD5: 0057ee56cc3d9792617746ad2fc2b355 SHA-1: 809d7add5ad0c5a3039cdfa8cebf57d737241ad7 SHA-256: 2aa06300c7f08398443d5bc1a3306d1b4145114712534c06d222d7336bca4ec1

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The critical ClamAV detection and high ML classifier score strongly indicate malicious intent. The presence of an XFA form and an AcroForm button with an action trigger are common techniques used in PDF exploits. The extracted artifact 'stream_001_off000008ed.bin' suggests the potential for a second-stage download or execution, consistent with the 'Pdf.Exploit.Agent-36874' ClamAV signature.

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` `4eefaf93813b6014696c6256c4ef463b86ecdfe044770716d68e700bca513386`	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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