Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffba0447e5a570f…

MALICIOUS

PDF

42.4 KB Created: 2021-05-11 15:08:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c210db7d21c11c14062fefa76c6c0119 SHA-1: ab06ddb6b6168708c32c2a798501cff91d156d55 SHA-256: 8ffba0447e5a570f55cd901631ebcb64595981ebcf3db61b519c04d5e0854d25
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed as a link farm, directing users to pages promising game hacks and generators. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-hack-tool-pc-download-game-hack, which likely serves as a gateway to malicious content or phishing pages. The document's structure and content strongly suggest a social engineering tactic to trick users into downloading potentially harmful files or visiting malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/406889139/coin-master-hack-tool-pc-download-game-hack PDF link annotation
    • http://repository.poliven.ac.id//repository/robux-game-com_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/best-free-minecraft-server-hosting_GM479516143.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_003_off00004ab9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB9 24560 bytes
SHA-256: 592ae4ed9b83003fc3638a8b246bad5a0158a4ac97c51d81e23cbe7d31d0430b
font_01_sfnt_off000082de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DE 18448 bytes
SHA-256: f69ccf4ac9a4c7b2b45b9f8ac93aa461b645c03c3d93edb8b39843cc7a5e0583

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