Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d04f1218bcaa08…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 07:34:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d1054fee330285a5c28cf9cb1a22f778 SHA-1: 0b9d9c0a6d9acff3803cdaf04ed8451aa1668555 SHA-256: 36d04f1218bcaa08b8a083e1a4daea4ff73b2716c5ecaed47191ac317200a9ec
82 Risk Score

Malware Insights

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

The PDF document contains a lure for 'Coin Master Free Spins' and includes a link to a website that promises game hacks. This is a common social engineering tactic to trick users into visiting potentially malicious sites. The ML classifier strongly indicated maliciousness, and multiple heuristics identified the game hack redirect lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/coin-master-free-spins-link-no-verification-game-hack PDF link annotation
    • http://educhina.mn/editor/files/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/is-pokemon-go-free-to-download_GM1094591345.pdfIn PDF document text
    • http://educhina.mn/editor/files/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-codes_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_004_off000050cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CD 24744 bytes
SHA-256: 5a7f67633ea91d5573a4fc31b56e0011a5be114135ec7ee26c889fc67b8910dc
font_01_sfnt_off00008918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8918 18188 bytes
SHA-256: 9c028cabc1bb5e28941c56192a15062bca5e24978f6557b783656291ce4b4993

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