Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8721b9906dc3bd…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 06:06:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf86222673b26bf02bc92fdac30dea9f SHA-1: 15518063400d41077c5f63154547f8aff515d913 SHA-256: 2a8721b9906dc3bd73dd526ab7b0afa7d9b22391e2b5d584396b0f700653baf5
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.co/app/431946152/how-do-u-get-free-robux-in-roblox-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/pokemon-go-free-60fps_GM1094591345.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/its-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-ro-piece-hacks_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-games-that-actually-work-2021-links_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-doge-head-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-premium-account-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-clothes-roblox-groups_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-bloxburg-free-release-date_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/dife-cf-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-club-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/i-want-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hacks-and-cheats_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_off000031b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B6 22372 bytes
SHA-256: aebdbcd5ca78de30eba751a1adaf3b0549f7d1ee968c11f7ca1c472118eb4ac0
font_01_sfnt_off00006340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 19228 bytes
SHA-256: e9c441dd269dbad57ecd329acbeb7edd64e6a25e858c99e81b6839147b8c1e0b

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