Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be9b66342d808ea…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 22:16:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 45784c9b1144764bcf671c6073fe49d4 SHA-1: 7460ae03a2f44f166bdd81a8e82e67a6abc06854 SHA-256: 1be9b66342d808ea2de73a3fe40fc88d022b2b08b583bea44d34c0e91e926480
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 0.9865

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/406889139/latest-coin-master-free-spins-link-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id//repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/worst-client_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-net_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-apk-hack_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_004_off000052c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C3 24600 bytes
SHA-256: 6b0e8be77782b96db1fe2f9b9b54f122f98b0d82bcd280b17f641fa4edef8ae5
font_01_sfnt_off00008b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B00 18056 bytes
SHA-256: cb1252db2fb22e48d32bdc3d2dcea27c54d261741ba9f8603ab19c70b0a9ddfb

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