Malicious PDF — malware analysis report

Static analysis result for SHA-256 227fdb33bc1b27f3…

MALICIOUS

PDF

33.5 KB Created: 2021-07-01 21:18:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 15ff9d4d692c3be114c0827aa4ef02d0 SHA-1: 995beaa42b6d71438b97f0c4907d0f03890a7fd9 SHA-256: 227fdb33bc1b27f340bd79dc0a0b08e1dd16a915038d2ccbbda8a4eeea6b93df
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 0.9980

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 http://netcdn.co/app/406889139/how-to-hack-coin-master-ios-jailbreak-game-hack PDF link annotation
    • https://www.transvision.id/ckfinder/userfiles/files/claim-robux_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/more-robux_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-daily-spins-and-coins_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
font_00_sfnt_off00002e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E31 22284 bytes
SHA-256: 19b6c1d4aedffc532f2707f70c80e5548de4f41e0637e1c283e473d1de5f7b90
font_01_sfnt_off00005f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 18564 bytes
SHA-256: 93c5f09ed49a64bd3339ac691ee5f88aee00b9e7a85e0b0b0901e6c59d799170

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