Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae2369c345e0037…

MALICIOUS

PDF

42.5 KB Authoring application: Mobipocket Creator
MD5: 24d15169124b8a52eccb296aea9129bf SHA-1: 0398e8bec32b3b70978bcc11df07e22e0829a218 SHA-256: 6ae2369c345e0037ae4159635d67282a6d86a8e0b874f26d2e892b0f406fcf89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files, indicative of a link farm used for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body mentions 'Nintendo dsi action replay software' and includes a call-to-action phrase, likely a lure to encourage users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://equestriansupply.co.nz/uploads/1/3/0/5/130540897/2060112.pdf
    • http://namyangitaly.com/uploads/1/3/0/5/130539414/lakepivojebo.pdf
    • http://mrobrien.net/uploads/1/3/0/3/130379143/kazodinimebosev.pdf
    • http://chickenindex.com/uploads/1/3/0/7/130738896/dejoteda.pdf
    • http://msluciamedina.weebly.com/uploads/1/3/0/3/130313021/e4893f.pdf
    • http://babyboot.com.au/uploads/1/3/0/4/130479171/pukugag.pdf
    • http://saverahwaypark.org/uploads/1/3/0/4/130483551/8296607.pdf
    • http://ugra-transfer.com/uploads/2020/01/29/lobijiki_diwolijenikisix_satubosewok_zopesa.pdf
    • http://briansherrishow.org/uploads/1/3/0/5/130539403/8df58bf60e5bef.pdf
    • http://sauerlandhypotheek.nl/uploads/1/3/0/5/130551423/130551423.html#nintendo+dsi+action+replay+software

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001237.bin
493707efbac164d66e397d01c186a73d52480b34defad4a6e8e1d6540baf2c99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1237 8380 bytes

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