Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae287968ddfab34…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 16:41:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a9377c771920e3952e26b41e8b45f74a SHA-1: c8ccfcdec34797779d573712e2b9172ab6b07902 SHA-256: 5ae287968ddfab34166917468a9d1d2534cf389c24caedf35ce3f92095e112b4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that redirect to websites offering game hacks and generators. The primary lure appears to be related to 'Coin Master' and 'Roblox' cheats. While no scripts were explicitly extracted, the PDF structure and the high number of external links suggest a malicious intent to redirect users to potentially harmful sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-daily-rewards-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-number-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/can-you-make-free-pants-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robuxs-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-outfits-on-roblox-for-girls_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/8-bit-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-jailbreak-hack-deutsch_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-scripts-for-ipad_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-hack-no-app-download_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-2021-may_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_off00002fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEF 23272 bytes
SHA-256: f5377716b526a68a6455321d3d12a586e80e4cccb80f6a6325cff723bc905da7
font_01_sfnt_off0000648c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648C 18592 bytes
SHA-256: b7c712f3d51e99dce86b9674f13da5830ff56d4c2df7ba89fc00be2805b7d194

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