Malicious PDF — malware analysis report

Static analysis result for SHA-256 74195d4a3fcf29c3…

MALICIOUS

PDF

45.2 KB Created: 2021-06-08 22:24:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d0b70d1b1bf12773299149880b14ba40 SHA-1: 4d311d7d84dc353abcd2132acb20a6344dc1f71f SHA-256: 74195d4a3fcf29c3a96b227cf13bb06d8bd58853d64623b607cb4804b6dd7e3d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for game cheats and hacks, presenting a fake CAPTCHA to trick users into clicking malicious links. The primary link, https://netcdn.tw/app/431946152/xbox-one-roblox-lumber-tycoon-2-cheats-game-hack, and numerous other URLs point to potential malware downloads disguised as game exploits. No scripts were extracted, but the document structure and embedded links strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/xbox-one-roblox-lumber-tycoon-2-cheats-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hex-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-coins-link-2021_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_off000051c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C0 25524 bytes
SHA-256: c9a64b78f1132b8d7f3d5d19b3877579a5d0d967aa30776de81507f1be44a4cb
font_01_sfnt_off00008c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C00 18984 bytes
SHA-256: 8df708366cc136ea3cde75e17418a36123b7a72dab05187e44483e5f26d3bf75

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