Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f84ef759fd2b320…

MALICIOUS

PDF

46.7 KB Created: 2021-05-11 04:18:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3ae0afdc2096ab0b70f52caad2c43a97 SHA-1: c1ff10ff0d3baac287acf9793183ae6469c28846 SHA-256: 7f84ef759fd2b32072ac10005436ef60f7ed12a047e2a9d44cc332026445237e
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 0.8948

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.xyz/app/406889139/coin-master-heaven-free-daily-spins-game-hack PDF link annotation
    • http://lib.stiesultanagung.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/extra-free-spins-for-coin-master_GM406889139.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_003_off00004718.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4718 25240 bytes
SHA-256: 57fe287aaf8985892ee6b859746ba05dd5053eeed354f7af38e58700101e30ad
font_01_sfnt_off00008189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8189 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off000093a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A2 18420 bytes
SHA-256: 3ecb90ef472e5e2f59c65ed4968a9b56eea25dc0e2c6a87bd992ad99bf12be05

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