Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0ec50b76d1d668…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 04:22:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4c53613f84d60235c73629a213b03d8e SHA-1: d186c0c35d2c8d88e8f2af08de7b4bc64477007c SHA-256: cc0ec50b76d1d6684ee7aa516a7d32c2e47023d9a569b4c3c8df82981c9f0769
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spin-app-iphone-game-hack PDF link annotation
    • http://library.stikessuakainsan.ac.id//repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/gainblox-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/make-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/find-hacked-roblox-account-back_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-cheat-in-minerh-eaven-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-create-a-shorts-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/cheat-forums-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-skins-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/freerbxinfo-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robux-hack-no-human-verification-no-download-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robux-hack-no-human-verification-or-offers-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/conseguir-web-robux-gratis-con-hacks_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_002_off00003229.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3229 22828 bytes
SHA-256: 9c7f54e854bcd65ec8cb1bc6d4a1613f852f7ffe85607c5aabb3ebc1084ae7d3
font_01_sfnt_off00006530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 18340 bytes
SHA-256: 22ec7c2df2d9c103e59d81394999ffb41531b6d4357b2311b3951123c8e62034

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