PDF malware analysis — malicious · d9e3c6306aed2f7f

MALICIOUS

PDF

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

MD5: e991fbf7f88ad7823281c9dc1f385af5 SHA-1: d41b1fb24f008bac06bc4d5ebebe26c761f8589c SHA-256: d9e3c6306aed2f7feef9f6efff76f74c630e9197d4500df594dfafd411402c22

110 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is a PDF document identified as malicious by ML classification and ClamAV with the signature Pdf.Exploit.Agent-36874. The presence of XFA forms and AcroForm buttons suggests an attempt to exploit PDF vulnerabilities. The ML classifier's high confidence score further supports the malicious nature of the file, likely indicating it's a dropper for further malicious activity.

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` `4ef6d4e20529f9d7215f75df605dbed98893e6dfb786bc7d529bf9af1e71f540`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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