Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afb841ef426d135…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 11:44:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 581fb54dd3a07335ec3eb7ee776e3a0a SHA-1: e2479887f696a6a7271d97d01a4d9c69276721e3 SHA-256: 2afb841ef426d1356f6661387966df5f09c98985dab66cfb94d995d65d08161b
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/how-to-get-a-refund-on-roblox-2021-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/protosmasher-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-gamepass-on-roblox-phone_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/give-free-robux-no-ads_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-free-tiktok-followers_GM835599320.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_off00002ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF9 22532 bytes
SHA-256: 62438033480767647abaa1addd0eaca6ad24540fe613369dcc57c673eb7b2857
font_01_sfnt_off00006190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6190 19472 bytes
SHA-256: ebcf4644d6ebc89312aa8fb6af48f11a47fef79a52bfe560c7a2e54bee320d1b

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