Malicious PDF — malware analysis report

Static analysis result for SHA-256 c371fed23ce79821…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 05:29:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ad46e74730fe470e987f7d646ef804f1 SHA-1: 20bd9bf780bebb29ad2d4a43f9d2a6a385b8ee55 SHA-256: c371fed23ce7982135a77e619618e273b84995c43aaeccb14fa8656ddd0464ba
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.online/app/406889139/cheats-coin-master-free-spins-and-news-game-hack PDF link annotation
    • http://lib.stiesultanagung.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/is-pokemon-go-free-on-nintendo-switch_GM1094591345.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-free-daily-spins-and-coins_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_004_off0000527d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x527D 25372 bytes
SHA-256: 2398b076e213fc909c72904d3059173bdbdc31102d421d2dca92209107665de0
font_01_sfnt_off00008d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9C 18392 bytes
SHA-256: 6e3532b57e357ea54aa540dad09cc71b9a89d5bb5520344c7ec5021d108e9267

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