Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d9ac7cca11b035…

MALICIOUS

PDF

41.1 KB Created: 2021-05-14 16:29:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 703e73e1d7d5232e1f78b5e1c5becd13 SHA-1: 186c0b0759affc829df2502917476b1d3bc21756 SHA-256: 39d9ac7cca11b0350e310e00e6e3b559e28b74e4539b19717cb334556517fb75
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 0.9971

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.xyz/app/406889139/coin-master-game-hack PDF link annotation
    • http://www.fluidtech.hu/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/moonactive-free-spins-link_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_003_off000046ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46EF 24792 bytes
SHA-256: be45c6a362f78a5fc94258163dd51f98a7c36f3898586933a0ecbe0280f38588
font_01_sfnt_off00008032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8032 17544 bytes
SHA-256: 5ee316c89f58fa7ece53e10d1822e70a80b2e7ece9f31707ca69690d36fdc75d