Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1f4b1aa5cdbdcd…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 01:43:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ced935fc8839d8035f2f9ef5a57c13c5 SHA-1: 2d79b18a13b3cf44d5811aa22bea335d3700a2ba SHA-256: 0f1f4b1aa5cdbdcdf8a34eb93f4e48abe0f3b27134075b239ca1ec3992bd470e
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.tw/app/406889139/coin-master-free-spins-apk-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/how-to-hack-roblox-using-xcode_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-sex-place_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-for-windows_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/add-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/pubg-uc-rate-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/pubg-uc-free-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/bug-me-not-hacking-in-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-an-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-without-human-verification-on-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-ninja-warrior-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-grand-blox-auto-cheats_GM431946152.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_off0000315d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315D 22560 bytes
SHA-256: d75b678d699a67735b52818f0b8103b6e633549acd7f9bbcd4de5b88e99674bc
font_01_sfnt_off00006370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6370 18344 bytes
SHA-256: 1dbe0fcba05c02502e584b0e7ffab6a4f048fc487afe950fa18a3df4b6395c6f

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