Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa253436618f59d…

MALICIOUS

PDF

47.8 KB Created: 2021-06-11 11:51:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b5cbd2999fbceb62a990273165f84a1 SHA-1: dbb6759692f1afb4e729d0a37a2060aa694e0108 SHA-256: 1fa253436618f59d2ef8af53c39fa7f282a6d62bd5cd4e1218c9d069b3816387
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 0.9769

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.tw/app/431946152/roblox-times-table-1-reasesen-5-6-friv-free-game-hack PDF link annotation
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/cheat-codes-for-bubble-gum-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-jailbreak-hacker-cage_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005063.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5063 25592 bytes
SHA-256: b36fdc604685fb7d7f7d2078d94e49a80c138b2d4d277efc99624541020ee364
font_01_sfnt_off00008bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB9 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9569 19112 bytes
SHA-256: f97853a5df41237ab34ca1b84b06e71b6a902c9994c261c45de6915ca9d68899

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