Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4626145a7ea3bf8…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 22:50:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4771b67fd5a92bea0f179ea81d9f2e9b SHA-1: df7074a0ee939a7cbf8e71b2038943e0960955fa SHA-256: c4626145a7ea3bf8432f5843d21a5f3d19ce716d66031344029c8a35d8e1cb03
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/406889139/legit-coin-master-hack-no-human-verification-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/how-to-call-roblox-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-hack-no-games_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-mobile-hack-tool_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-how-to-get-free-gamepasses_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-robux-free-2021-an-fr_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-mobile-app_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-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_off00003150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3150 23288 bytes
SHA-256: 4b2513a0da0cdbaadf2b2ca8627fa0996e295e69c912dafdaf9c4d9ff9cea861
font_01_sfnt_off00006566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 18540 bytes
SHA-256: 944ef90ac3957acf4ab0155e17f54942f1cad929ef859b36db5d7006f4b781e4

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