Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5110a0ed63959d…

MALICIOUS

PDF

18.3 KB
MD5: b7f2d00dcd03ca027bbf76cec2246f47 SHA-1: 75d7a88a221bf4bbd77579ed2b7142a23f188ffb SHA-256: cc5110a0ed63959d487d1e5b8c14dc9fa048d95c15d0723ae9bcaa04369e99ed
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The PDF file contains an embedded script payload and was flagged by multiple detection engines, including ClamAV, as a malicious exploit. The presence of XFA form elements and an embedded script suggests an attempt to exploit PDF vulnerabilities. The embedded URL, while seemingly benign, is present within the document's structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000329.bin
f7f28040af6c527bc2d911f039b7c9ce1b108791860fe45b48d44df570525aa3
pdf-embedded-script PDF raw stream script payload at offset 0x329 18035 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely