Malicious PDF — malware analysis report

Static analysis result for SHA-256 9720b7fdda198b5c…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 02:26:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 75d46fc4286e95bd7c3499059f869a97 SHA-1: 09f0cfffc020717a4b4df68d13761be46ef7e7d9 SHA-256: 9720b7fdda198b5c945407d71251ff6dfa7b53397bb02afe6bf65e6ca176ce0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a redirector URL, which is associated with malicious activity. The document body and heuristics indicate a lure for game hacks, likely to deliver a malicious payload or phish for credentials. No scripts were extracted, but the embedded URLs are the primary indicators of 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/archery-master-3d-hack-unlimited-coins-cheats-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/114-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/rbxdemon_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-places-download_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-roblox-games-that-cost-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-free-com_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_off0000342c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x342C 23160 bytes
SHA-256: 90689af76d864e8416c8a1e3a33e1908e8a99552925b6b13f021c366716f8386
font_01_sfnt_off00006816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6816 19384 bytes
SHA-256: 6d80dce4fa699b9076a8b175d16ed475ccfb6ff0dc0169280df9c553a7f08f53

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