Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5de02beddeee9a0…

MALICIOUS

PDF

44.7 KB Created: 2021-05-15 08:36:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f84bf9c4df89e71331a37a97d35cf023 SHA-1: 1a51161bc4d2705249404ddddc8a03f660b3a655 SHA-256: a5de02beddeee9a0a8f1b479a42497df4cc5792b269cb117ce0ab56449b0decf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body, though heavily obfuscated, contains references to the same malicious URL. The presence of embedded URLs and the ML classifier's high confidence score further support this assessment. No scripts were extracted, but the primary attack vector appears to be a phishing lure leading to a malicious redirector.

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 https://netcdn.xyz/app/479516143/free-minecraft-skin-maker-game-hack In PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.st-augustines.staffs.sch.uk/admin/ckfinder/userfiles/files/rbxoffer-com-free-robux_GM431946152.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_off00004c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C92 29584 bytes
SHA-256: b63323bae0e17f4fb53c61605c89f2ebf3b0ac165becdcf498f3918d9b152191
font_01_sfnt_off00008e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E56 17740 bytes
SHA-256: 7e8236a58a56ce0148da12d4a95e9c7df934e3b28e502a8d8a58237e3f9d26f8

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