Malicious PDF — malware analysis report

Static analysis result for SHA-256 204ac10350734e00…

MALICIOUS

PDF

45.2 KB Created: 2021-06-08 17:30:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c85836db0fce095f64867a509a305989 SHA-1: 809e65066ead8baa88e665502bc6a7b22f5b17ed SHA-256: 204ac10350734e00fc28407aa87d56bcbace05d2e133fb5acc97ab83c3188609
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 0.9864

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 https://netcdn.tw/app/431946152/free-hat-in-roblox-2021-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-5-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/cinnamon-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-on-roblox-easy-steps_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_004_off00005384.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5384 24940 bytes
SHA-256: a9d2ab4e40e2f0f3600abbae79dac438175affe48c17f6c7b272cc8acb64d1d2
font_01_sfnt_off00008cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDA 18684 bytes
SHA-256: 01cc22a4d2c48c0ad1eb909bfbe3b807f34e4dd03a372a48026bbaca3a51f517

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