Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70d46cd0487f239…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 16:39:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b50fd982e2475dcd0de3f423798a775d SHA-1: a9cc7d5d04686593fe3fa845bd76b6b6090a7192 SHA-256: a70d46cd0487f239cc8b138cf2d1c9daf7027b2a5b418c78ceeaf5a8a3a91dd9
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 0.9865

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/roblox-good-free-lvl6-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-no-hacks-no-scams_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • https://www.micIn 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_off000051e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E7 25012 bytes
SHA-256: a4f488ba2ed3503bf7be398501ef9a62b126e7fec6691ecd701ea9c3c98b80be
font_01_sfnt_off00008bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC3 18404 bytes
SHA-256: d3fd55821e2c9a6424c368f59b800e5f7db0e57da179d7f9f5978d75241bb745

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