Malicious PDF — malware analysis report

Static analysis result for SHA-256 21866561c07d445d…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 01:25:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: de2f8c841abaf45f0afe2de44f5944ad SHA-1: a06a09f9b9f0c78cbd98dc1a1037359946df6f08 SHA-256: 21866561c07d445d9460a234d1a08c4885ad6034882cc11dfce6282a22fb13ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The document body and embedded URLs strongly suggest a lure for users seeking cheats or free in-game currency, leading them to potentially harmful sites. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/dolphin-hacks-roblox-website-game-hack In PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-dll-hack-april-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/draw-it-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-in-roblox-dungeon-quest_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/login-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-100-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_off00002e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E62 21932 bytes
SHA-256: ddba38cc43deeb75dabe31efca8c4e4e33ef554d9bf2cfded5183b4f8e7bc4dd
font_01_sfnt_off00005ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBB 19588 bytes
SHA-256: e7fbc1dd31c4d15b928f3b757cb6a99c44758fa70453b3fa5849800fa3648af5

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