Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b90b40f232fcc86…

MALICIOUS

PDF

43.8 KB Created: 2021-06-08 17:01:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 333fe12f75c811a5f37b964a9e475aee SHA-1: 377ba77342a74cc1c628a6a759e10226b3b5054b SHA-256: 4b90b40f232fcc861a959297513b7708df8f1034fe7a4929a71a50706b3bb1cf
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/spin-hack-roblox-game-hack PDF link annotation
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-booga-booga-cheat-duplication_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/cheat-engine-roblox-windows-8_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-minecraft-maps_GM479516143.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_004_off00005153.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5153 24120 bytes
SHA-256: 66df9d1b9b0b68900eafcb379f5d295426291c58c76866c50f1f2da4dc614fb5
font_01_sfnt_off000087bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BC 18480 bytes
SHA-256: 3a312fe47e22b3e33720b00aa3660b954fbbd69ee4b61c724ecf9bdd98f85ecc

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