Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1dcf517fa9d2c2…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 00:46:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e0973a6e0ce01d8b18092e9a2c25e26b SHA-1: 4733868589ad90c2fd95d121e60870ad3dcfaab4 SHA-256: 3c1dcf517fa9d2c217c0ce4fd917b8c5cc704ade9e406130d193e4f319ea5216
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.co/app/431946152/how-do-you-get-robux-5m-for-free-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/btools-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-jailbreak-new-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cheat-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cheats-for-city-architect-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-atravesar-paredes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/all-free-for-catalog-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-vip-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-noclip-on-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-buy-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-hack-no-verification-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-system_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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
font_00_sfnt_off00002f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2F 22908 bytes
SHA-256: ee71326275f64c8b07a9fb96789a103672d4f7ce69ce9b754ea24f7f894d50e6
font_01_sfnt_off000062aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 19708 bytes
SHA-256: e9579a30eaf0734c3239d9f1add5c77f75ed4aebc751614a3409559580815335

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