Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba1399cdf3417d5…

MALICIOUS

PDF

21.8 KB Created: 2017-11-09 08:17:23 +01:00 Authoring application: wkhtmltopdf 0.12.3 (via Qt 4.8.7)
MD5: a8aef66afa1cd50ddc49f98e177f90b4 SHA-1: bab3556f1ca23163d0e79cd0457194532405e69a SHA-256: 8ba1399cdf3417d5d9bb09d8a59845ac6b888ea05f6ccb88f33a07244712642d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file is identified as an image-only lure, a common phishing technique. It contains a clickable link disguised as a document review prompt, directing the user to a URL shortener. ClamAV also detected this file as a known dropper. The embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0293

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7280696-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7280696-0
  • Image-only PDF lure links through URL shortener high PDF_IMAGE_LURE_SHORTENER_LINK
    PDF is image-heavy with little real text and its clickable action points to a URL shortener. This is a high-confidence credential-phishing carrier shape: the visible page is a screenshot-like prompt while the destination is hidden behind redirect infrastructure.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 21 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://ow.ly/uRXd30gssaZ

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000024f7.bin
cf87842e1ab02b3f31c821717b166831046f5fa0e93a2c6d1c0d735c1d6c850b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24F7 10144 bytes
font_01_sfnt_off00003fbc.bin
07f8dad691f7fd6bb399c8ea190d23e2b653dd722f0c6b300856437b7e37d436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FBC 9008 bytes

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