Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1865eb3f70c7ac2…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 22:37:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b28c6174e0d947078dbb7f222b43fd9f SHA-1: 40dca17cef7494d678bef516acd61e29f7034ae0 SHA-256: b1865eb3f70c7ac20539fe13c4a820b2fa7535bc9d1ef9e2bd0506ffe0f41e0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors, specifically advertising 'free hacks' for games. The primary lure URL is https://netcdn.online/app/406889139/free-hacks-for-coin-master-game-hack, which is associated with known malicious infrastructure. The document's structure and embedded links suggest an attempt to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-hacks-for-coin-master-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/link-for-free-spins-on-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
stream_004_off00005085.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5085 25600 bytes
SHA-256: 5e2b666eff2f77ad96a0df6824460f4766dd57a7aacadd816a12174fabb3ea4e
font_01_sfnt_off00008aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFF 17880 bytes
SHA-256: 2beebd07a7bf3792acdee249f7a2a83ed44f2fe9f2bfb57386b991bf1122f076