Malicious PDF — malware analysis report

Static analysis result for SHA-256 08363b4458efb844…

MALICIOUS

PDF

50.5 KB Created: 2021-05-14 13:03:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 338703e8b5a5310cb9e5d007ecb71e22 SHA-1: 214d89bf2f2c6877ca24de30bcc4b0730c12fe22 SHA-256: 08363b4458efb844cd17386f05a32c6aacad60f52b7f8aa2a8f670ae4f965abc
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/406889139/coin-master-game-free-play-online-game-hack PDF link annotation
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-coins_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b71.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B71 24736 bytes
SHA-256: 0c94917e16a38cfe957abb696056dd7b55324ead67d6d5111c1df10023a5ec42
font_01_sfnt_off00008311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8311 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0F 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000a29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA29A 18380 bytes
SHA-256: b5bbbc623ea736b659451b361c4225dcdb8ece8dfba16a3ff4312aad2e8470ed

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