Malicious PDF — malware analysis report

Static analysis result for SHA-256 795a7e2744372029…

MALICIOUS

PDF

44.4 KB Created: 2021-06-13 20:05:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 073d815a1d3c1a6ebe816c9940afc089 SHA-1: 4a8d4660cf45d6f2c699df34f29c0baf852a144d SHA-256: 795a7e274437202959804dcab76af0ee144bfb845557498884988071f9dbc04a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9632

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/accounts-with-robux-free-rocash-game-hack PDF link annotation
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/robux-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-do-you-get-free-robux-on-laptop_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48FD 24172 bytes
SHA-256: 27f5e678c12064328414a8234f271fdd7ba1f9023e96b35dc2275493a1150625
font_01_sfnt_off00007f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9B 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000894b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894B 18832 bytes
SHA-256: aa4a893cf7af689867f4c9f71f0316be946b939f3dc75002eea4f027063865cf

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