Malicious PDF — malware analysis report

Static analysis result for SHA-256 de9bf9371ba14eac…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 12:14:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a8e075571e3599fa08b521143846f547 SHA-1: de17772063ad20dcca13fd031d6eff0086bc7e25 SHA-256: de9bf9371ba14eac3011ad3dfd7c2c3aeb57c7c61cc6783182edadbfa3a7378b
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/431946152/bux-free-robux-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/easy-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-hack-no-download-no-survey-no-password_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-nerf-fps-2021-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-wings-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-skywars-coin-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tiktok-free-to-watch_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-do-you-get-free-food-on-coin-master_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_off000031c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C2 22936 bytes
SHA-256: 1ea954f84d621ac703b545f8603461ed90684ce441b420e6ddb16c55296508a3
font_01_sfnt_off000064ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EF 18716 bytes
SHA-256: 387288f024d8c8f54f23c256e97e071e9b3801b919dc08d0a5cbca9b70f610f0

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