Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc027e35b2c266d3…

MALICIOUS

PDF

48.8 KB Created: 2021-06-10 23:44:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 30476cadb968d90db13abbc94ecc829e SHA-1: 186f82b705e3176f50528469429ed7daf99c84cf SHA-256: cc027e35b2c266d3114bd159a80c289b867570634f818b62800597a7d7e962f8
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9796

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/hack-for-trasure-hunt-simulator-roblox-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac//repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/village-coin_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/wurst_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/prison-break-16-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/mario-64-roblox-rom-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-net_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-games-80_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F7 24548 bytes
SHA-256: 17fee92fe55176eebb79f00c18351eb182b674472de5b75f6c821ba590209913
font_01_sfnt_off000089f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F7 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_02_sfnt_off00009a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A04 18968 bytes
SHA-256: 3aac21a015edb338f16f906741eb8c6bc4b9dc78c0b8264dcec4139629627ba5

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