Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb5fcd228efc4b3…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 12:16:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3755d1b01f69ec8252f2325453453cc9 SHA-1: 1ad7719fc23e171e5e6d80196f5f690f658092a8 SHA-256: 0cb5fcd228efc4b3d683a56ee04be00397559eed2318393d6090af4ee71083bb
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/coin-master-hack-ios-download-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/wurst-115_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/app-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-wings_GM431946152.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_off00005054.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5054 24076 bytes
SHA-256: 0c06b05f807787615317e95041d7f0378ab2654f18fbb3efe4942bd08f0946c9
font_01_sfnt_off0000871d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871D 18296 bytes
SHA-256: abb5dc3882d33bb675e42633b9ef907b5fa8a8f8ffe877e273a1ba74b2e79714

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