Malicious PDF — malware analysis report

Static analysis result for SHA-256 53bbf20199f7f818…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 16:44:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 641210b69dee57c0d76ea56e78e55f2a SHA-1: b75135b51af104b8f867df5881969f04b135f6ab SHA-256: 53bbf20199f7f8180c3ed5b88428f252167c2686b6d053b41f14d9546b5d0972
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free currency, containing multiple links to redirector infrastructure. The primary redirector URL, http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-game-hack, is associated with malicious activity. The document body and embedded links suggest a phishing or scam attempt to direct users to potentially malicious content.

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-spins-and-coins-game-hack In PDF document text
    • http://stitqi.ac.id/website/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/pokemon-go-free-hack-download_GM1094591345.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/is-free-robux-real_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_off0000316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316D 23500 bytes
SHA-256: 42b69df1db5d696e8661780d15df41746734af65b04fe5d18d47b2d9812dabc6
font_01_sfnt_off000065ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85