Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d99fb4cdb882fff…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 01:18:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 65d9c1c085ef1ebde5f9cf246a86bd1e SHA-1: 298d32d206d40afcee5390d765f8754c192dadb6 SHA-256: 9d99fb4cdb882fff3388bb1c32cbdcd3a9c68cd1a87d6590542cf300a25328ba
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/are-you-allowed-to-hack-roblox-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-follow-flamingo-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-my-hero-release-boku-no-free-code-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-with-no-human-verification_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_off00003074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3074 22628 bytes
SHA-256: 0240f60b307bad5b6579705636292b78daa27279afd98e2aa5fd732618b257e0
font_01_sfnt_off00006319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6319 19296 bytes
SHA-256: cbe322899546e15e5444be96fed2229bb63ce54244520aee749c0ac2df6a34b6

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