Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cba54d3af287e41…

MALICIOUS

PDF

50.1 KB Created: 2021-06-08 16:50:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0660ab13d442ced962fde9c47a937075 SHA-1: 65afc1bfeaf2b6cd9f2e970dfc4822475e42d101 SHA-256: 9cba54d3af287e41fef77f329376083b56f9dcfaf7269f6c86e9c5c143bdc893
122 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically targeting users interested in game cheats. The document body and embedded URLs reinforce this lure, presenting a fake CAPTCHA or human verification prompt to trick users into clicking the malicious link. The primary IOC is the redirector URL, which likely serves as a gateway to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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-hack-download-iphone-game-hack PDF link annotation
    • http://lib.mappifhui.org/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/el-mejor-video-de-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spin-realme-products_GM406889139.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
font_00_sfnt_off00004f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2E 29128 bytes
SHA-256: 825159c81ccb23f6cea5b26633a491f3f42b4033e7bf0edf9e3d273f86e1161e
font_01_sfnt_off00009377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9377 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off00009f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F18 19028 bytes
SHA-256: f7e8b2d5db0e7201c49aec44f1598b610ab505a2a554033a862b6b0afde748ad

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