PDF malware analysis — malicious · bba83a360dd9f3bb

MALICIOUS

PDF

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

MD5: 1d048f5c2419930b96611e72e85c8a63 SHA-1: 689d90b8dbf61a07c2d5844fbe9d1904081d62dc SHA-256: bba83a360dd9f3bb4a1fc7aa02b06a2a84bbe559d6074ddf14899dcd433da5ce

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

The file is a PDF document identified by ClamAV as Pdf.Exploit.Agent-36874, indicating a known exploit. The ML classifier also flagged it with high confidence. The presence of XFA forms and AcroForm buttons suggests interactive elements that could be leveraged for exploitation. No scripts were extracted, but the PDF structure and exploit detection strongly indicate a malicious payload delivery.

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` `577038a9b5ae991c430436b54dcf0dd8aba640e42a844b1017615900dbd0c977`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1490 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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