Malicious PDF — malware analysis report

Static analysis result for SHA-256 c659d58a3b95a164…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 06:12:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3f8bb912fb760220c663c3720a9390e7 SHA-1: 561d1ff8d61b46da4e1a7a16be33859e2b604322 SHA-256: c659d58a3b95a164b259734007c6d6940a2440bcfc3a3668a76852ddabe2258e
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 0.9832

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.online/app/431946152/free-robux-com-2021-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id//repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-points_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-hack-download-apk_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BF 27604 bytes
SHA-256: d48708f9b47b72f98ae1b5f479e922f0f0d7315d19b92228492c1358405d98a3
font_01_sfnt_off00009220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9220 18676 bytes
SHA-256: db7deb15448d884d15c6a42f746ab8a768d26593fd7e085f0109997e06cd96ff

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