Malicious PDF — malware analysis report

Static analysis result for SHA-256 688b29b0292787e3…

MALICIOUS

PDF

42.8 KB Created: 2021-05-10 15:55:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 71b9b4ae4dc3a6d3f97ffcb1ada47fa3 SHA-1: d681442b43874b690ef570f0227bc6968c482bd6 SHA-256: 688b29b0292787e3616e677f087481b8ea409c92d33f67032b181bbd15c3e90a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link and lure text related to 'free spins and coins' for the game Coin Master, directing users to a suspicious URL. This indicates a phishing or scam attempt designed to trick users into visiting a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-spins-and-coins-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/wurst-112_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-get-free-cards_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_003_off00004d19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D19 24520 bytes
SHA-256: f104b595700a963324887d2fe6af5d0cc1b42ba7ae30250c1448ac5bf80be03d
font_01_sfnt_off00008574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8574 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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