Malicious PDF — malware analysis report

Static analysis result for SHA-256 172904bcd9706efe…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 13:47:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c97a4d2e8e60aec9b5dda052a059bbe3 SHA-1: 87f96180ebac866a3d6996342619096969ea3c1c SHA-256: 172904bcd9706efe88eb32c60ca1e35686104b6e078d7bdb8fc4d3113e0e5d92
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 0.9865

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 https://netcdn.online/app/406889139/wwwcoin-master-hack-apk-game-hack PDF link annotation
    • http://oca.undil.tl/repository/game-toolbox_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/tiktok-free-folowers-free_GM835599320.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-spin-free_GM406889139.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_off00004e11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E11 25384 bytes
SHA-256: 4bf2ae7aac646fc1580b15406a0cb13608580d148cae1cced5dbda12b88b113c
font_01_sfnt_off00008729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8729 18252 bytes
SHA-256: 6ad30ca5bc7219b5bac55008a01cbe3e57e256f2ef7eba8ef5748447f010f172

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