Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6cf3d028bd7477e…

MALICIOUS

PDF

36.3 KB Created: 2021-05-21 11:10:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 12bd731118c5724e0349b21b02bbfba0 SHA-1: d8dd350d063f8ca94ec2c64f7adfb4aab9cfd4c8 SHA-256: c6cf3d028bd7477ea4d567dfa2c6fb1761d99bbd13993827154fe5ffed93389f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.xyz/app/479516143/how-to-get-a-free-minecraft-server-game-hack PDF link annotation
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35F7 24640 bytes
SHA-256: 285573ef98c80992225090c8b8830acd1f13de196baf2f84bba03320f7034db0
font_01_sfnt_off00006d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5A 17988 bytes
SHA-256: 888c9dccd83fb0c13f9447925305c3d56d9429efcbe621f5ab8e9b5d24de1b14

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