Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe1aca50b18fa00…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 14:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b49864cd012ec266e4ca0b32fef8586f SHA-1: f4d76f1c761076229a09104c35547c0ad3c6545b SHA-256: 3fe1aca50b18fa00fd3d7ba2e25a69ae7a0098e4f5c25fe435519d88f11f0567
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/daily-free-spin-link-for-coin-master-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/leviving-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-did-roblox-get-hacked_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-hack-robux-generator-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-online-no-survey_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
stream_002_off000032e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E6 23036 bytes
SHA-256: a02e3bdcf754565af11642f9ed82e65ae7c841f6f6f13bcd547e6eb1f4f5d1c9
font_01_sfnt_off000066dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DD 18768 bytes
SHA-256: 84e60b0c833095dcfc8bdf529583e07b6d46dae7c19f787dcb3f544e86957181

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