Malicious PDF — malware analysis report

Static analysis result for SHA-256 c271799cd692c73e…

MALICIOUS

PDF

54.7 KB Created: 2021-06-11 09:29:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f16763899bab987d6de4294b1d49299b SHA-1: 66e83dd19e398db80c8ca1e46f2a1818bec6ae66 SHA-256: c271799cd692c73e4bee9e8bd386bc655e91a709c07a7a13cc0672949496ea0f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to trick users into interacting with malicious links, specifically related to game hacks and cheats. The embedded URL, https://netcdn.tw/app/431946152/how-to-get-the-cheat-engine-on-roblox-game-hack, likely leads to a further stage of infection or phishing. While no scripts were directly extracted, the PDF structure and heuristics suggest an attempt to exploit user interest in game modifications for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9470

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/how-to-get-the-cheat-engine-on-roblox-game-hack PDF link annotation
    • http://slims.abulyatama.ac.id/repository/how-to-hack-denis-daily-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.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
font_00_sfnt_off00005208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5208 28236 bytes
SHA-256: 607773385fc555da7cb8a05e3cc72d5862befd40258ae8cbc82570e844598a7c
font_01_sfnt_off000092ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CE 3608 bytes
SHA-256: 608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f
font_02_sfnt_off00009f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F51 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_03_sfnt_off0000b134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB134 18856 bytes
SHA-256: 00a65cb589aea68ed1c4f48e36d5e118954b752dcde35410b3ce499b3439c40a

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