Malicious PDF — malware analysis report

Static analysis result for SHA-256 057c49518dea4d75…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 10:16:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f8aee4290af3aeb9b6708d514541effd SHA-1: 5ab7a5e556e798c4807e801578a7d859c69399a0 SHA-256: 057c49518dea4d758f0665275a494e796b06b052b9d667f3590b52cdc9798341
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game generators and hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirection workflow designed for user compromise.

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/406889139/coin-master-free-daily-spins-2021-game-hack In PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-roblox-autofram_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/ming-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/download-cheat-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/hacks-for-sprinting-sim-roblox_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/get-free-robux-without-downloading-games_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/como-tener-dinero-infinito-en-jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-to-get-free-robux-on-alcatel-a5_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/roblox-aimbot-free-download_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_off000032cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32CC 23204 bytes
SHA-256: e4b63a4ae2fbb3f21819149c84e80228ca2f1ec0e8cd30934a5dad17de6fb1d8
font_01_sfnt_off00006718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6718 19000 bytes
SHA-256: fe44b8dc0286c11eb9316a1d3eb321ff3ae19d9947d0f6ad420bc13b052cb0ec

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