Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac78316f23e3bb5…

MALICIOUS

PDF

49.0 KB Created: 2021-06-03 13:54:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c8dffe35c820df394ab625135da95366 SHA-1: 9d0d920dd55a32ced1691708a72e5bc31d16bbb9 SHA-256: 6ac78316f23e3bb59b3569c3d9a4b66d31d53751bba143ca60461411e461e059
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/431946152/how-to-get-robux-for-free-2021-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/pubg-uc-redeem-code-midasbuy_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-bedrock-edition-free_GM479516143.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
font_00_sfnt_off00005621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5621 27016 bytes
SHA-256: e960fe003cdd8e9159cb2438597e89b1b03e8560fc6b96b84950057627e249eb
font_01_sfnt_off000091c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C1 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off00009b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B71 18684 bytes
SHA-256: 65f445f0396e54760dd2a1edc1744209422bc48f29c35ea74a9bcb72e79f8b06

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