Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfa036ab305e3c3…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 17:10:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e7bfaec98a63f2c9c43b60625a7be2e5 SHA-1: d4d9e584426031c0d2c4f59f5c4d035d5d6dd0da SHA-256: 6dfa036ab305e3c3ccfd0c8ee84b9f795b5fba8065a1afe0082c76f8b517ccbf
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 0.9796

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.online/app/479516143/minecraft-free-download-mac-game-hack PDF link annotation
    • http://rkh.go.th/ckfinder/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000056a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56A6 25648 bytes
SHA-256: 713def3a9345611c2fec010425b0240a0cad8ce16022e7d35b9d43137f665975
font_01_sfnt_off0000901f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901F 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off00009a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A92 18292 bytes
SHA-256: eff5919d985126b8591bb7cd3dea6a103dcf6f67049ada279646be2986fdbf31

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