Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9b3b1771ebf724…

MALICIOUS

PDF

32.7 KB Created: 2021-07-03 17:23:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5734f6fee293446105bc624e067c5c94 SHA-1: 5323d50850f63debf60c6849c41fd4909cb9d676 SHA-256: 0c9b3b1771ebf7240594668c0fa438c82217ffa3f0edbdc28d4a6b69dc79677e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that lure users with promises of free game currency for popular games like Roblox and Coin Master. The primary link, http://netcdn.tw/app/431946152/roblox-www-com-game-hack, redirects to a malicious site, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/roblox-www-com-game-hack PDF link annotation
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/distork-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/my-roblox-girlfriend-cheated-on-me_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-wizard-life-money-hack_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-maps-wwii-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-spin-link-free-download_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
font_00_sfnt_off00002a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A35 21984 bytes
SHA-256: fa34407b170b83b0397a419c43133eefaf128dc04e2e12aaf05de2ff96076297
font_01_sfnt_off00005ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC7 19108 bytes
SHA-256: ceed28034d8c161028cd36873b2602c2ebba079ae57d119b604a35ba28887711

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