Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d066f2c07d40bb…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 13:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1cd040d47622a6f928c30741ff0fcc7c SHA-1: 7900304e0c9b7820f18bbb6848f0c8b3186c8541 SHA-256: 39d066f2c07d40bb8ebd7468631954bce293eb2d16016d36c0c1bd8157cc2d5a
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 0.9748

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.online/app/406889139/coin-master-hack-ios-10-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EA 24316 bytes
SHA-256: 3e402b0985ba4dfa6f76f026f607cb117763da38277da61f41c757ad1a6ce83d
font_01_sfnt_off00008ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB2 2896 bytes
SHA-256: 98478e2fbfabd582329b6206c0d46f67523cf5e299cb16118f1065b4dd5ec6a6
font_02_sfnt_off00009498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9498 17996 bytes
SHA-256: 58ade539adf3b952ce76e8d334eb1b4796e6809d7279a56372c35fb3cdc2955e

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