Malicious PDF — malware analysis report

Static analysis result for SHA-256 53825cdd28b10fac…

MALICIOUS

PDF

34.6 KB Created: 2021-06-22 07:57:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dd983201a5c9d39337a7ba2d2ebec265 SHA-1: 856b5a7bd094423f041c04e35ae9ac1815c11216 SHA-256: 53825cdd28b10fac995e8e26039bdfbaae6c4b12b776084369c6b99970de1785
160 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 0.9980

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.co/app/479516143/minecraft-mojang-free-game-hack In PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-roblox-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-dominus-toy-code_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-tiktok-famous-for-free_GM835599320.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://www.st-johns-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F4 22492 bytes
SHA-256: a2d9d0f1a06624686c1c14c4c8a4c986607db61db2cf84919bebe07482e916ab
font_01_sfnt_off000064e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 18188 bytes
SHA-256: b5f50bf57dfccd752109e4182842bacf3724a00f1b96a34c084e43a5ee255f71

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