PDF malware analysis — malicious · d13690bb9f6f13ef

MALICIOUS

PDF

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

MD5: d99215209fc00af5d8282d71706223b6 SHA-1: 7e3f9b37a44cecae49c6b16a37374e4b97a0fe5a SHA-256: d13690bb9f6f13efcf563d188c9cf200f2694d75fa3b6e51b4dda3219c8d0315

108 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PDF document flagged by ClamAV as Pdf.Exploit.Agent-36874 and a machine learning classifier with high confidence. The presence of XFA forms and AcroForm buttons suggests an attempt to leverage PDF features for exploitation. The embedded artifact 'stream_001_off000008ed.bin' is a decompressed PDF stream, which likely contains the exploit code. The document body contains obfuscated text, typical of exploit-laden PDFs.

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` `40039809a6191ad62881462f625099d1a7b3043fe488994e64476fee5f671fc3`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8ED	1414 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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