Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c255a9d570e3e2…

MALICIOUS

PDF

34.6 KB Created: 2021-07-02 03:25:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b90befe76fb2dd689da333f0cf49a789 SHA-1: 1ec616c767a4d5e081e1085f06a3f51783a053b2 SHA-256: f1c255a9d570e3e221562d078cec10141355ddaf55de3543b2a1b62a4c29ccdd
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/site-to-get-free-robux-game-hack PDF link annotation
    • http://digilib.stiki.ac.id/repository/como-ser-un-troleardor-en-roblox-sin-ser-hacker_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-sell-a-tshirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-free-shopping-apk_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/cheat-engine-roblox-speed-hack-code_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-promote-your-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-cheat-theme-park-tycoon-2-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/gamepass-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/adopt-me-roblox-cheat-codes-twitter_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-how-to-get-japan-sushi-card-free_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_off00002ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA1 23016 bytes
SHA-256: 116b29090dc3c105ad9fe4ae272f9e29015240de1faa3029ff188f49d051d606
font_01_sfnt_off00006268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6268 18940 bytes
SHA-256: edaa5a94f24f50b2faf583113cfe2473c8704fd54fd99c5ef12cde81bebbe29e

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