Malicious PDF — malware analysis report

Static analysis result for SHA-256 140d85330952cd39…

MALICIOUS

PDF

33.8 KB Created: 2021-06-28 14:13:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 98b050d098c2354b636246fb748439f3 SHA-1: db44f41189d0f66304fa8d4fc9565dda3601262b SHA-256: 140d85330952cd39ac3136240684fb7a14a9790d62437e5810ce2b0f50d8fe93
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/free-bucks-roblox-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/zeus-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-cheat-in-legends-of-speed-race-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-animation-packs_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-add-cheats-to-a-roblox-game_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/purest-roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-adder_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-windows-10-free-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/codes-for-hacking-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/download-roblox-music-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hacks-real_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
font_00_sfnt_off00002c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C52 22744 bytes
SHA-256: e1fb8ea05d64e2046f550e93bdf53c3b4e8d365cab400d753e9adb6fb6b2bcb2
font_01_sfnt_off00005f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F68 18960 bytes
SHA-256: 56195aab18f132b51282f2e43e181432a899bffcbbfd695eeb30d912aefda125

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