Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f30addd6df6398b…

MALICIOUS

PDF

35.2 KB Created: 2021-07-09 15:27:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 56020335264073e39daaf13de2ad7ff0 SHA-1: b3816fa6a7a9accd8561471b7078041b3e85c16d SHA-256: 7f30addd6df6398b002d05f5ccd67e7f377491b27a3db75add046eee7036e04b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are flagged as malicious redirectors, specifically pointing to a lure for game hacks and generators. The document body, though partially corrupted, contains references to these lures and the malicious URL. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/479516143/minecraft-pe-server-hosting-free-game-hack In PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/pokemon-go-free-quagsire_GM1094591345.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/getrobux-come_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-unlimited-coins-for-coin-master_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_off000032fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FC 23192 bytes
SHA-256: cc50b1e9d87ae16256c8cf19ef1ba06f47a2aac5fe449011c6243c46bedd1e60
font_01_sfnt_off00006734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 18264 bytes
SHA-256: 5ec3f0b561cebc5d47f64e939320a46a649b92723dcace5f5f230f044584545d

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