Malicious PDF — malware analysis report

Static analysis result for SHA-256 2710a9d837fd66cd…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 04:32:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: aff41e0a8afce31a29b246c88d6ec1b1 SHA-1: fa9c8523c3c68374ab1ef3164f8afddd6a080ada SHA-256: 2710a9d837fd66cd962ba105a19d444e08db9f5511c8eee3fbc2877c9f37de2a
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/coin-master-apk-hack-2021-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/roblox-fly-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-code-for-roblox-december-2021-unicorn_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-vehicle-sim-money-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-promo-codes-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-robux-the-easy-way-by-hacking-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master-app-ios_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
stream_002_off00002fc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC7 22740 bytes
SHA-256: 9c7cf8088ddb3b3d6a190fd41d19069234f8513f50f3631ba597a99d044fbe2e
font_01_sfnt_off000062a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A3 18580 bytes
SHA-256: 9ddf7aed626e59ba525b858e6801d404809e6e62faeb09e5b62449fd66731fe4

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