Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb042a806da811a0…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 03:37:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7ffba3d234d6ff7a39f1bbed2dc907ce SHA-1: 7331693ec1dfddb361f3913811487c0e3c2e3d0d SHA-256: cb042a806da811a0dab4d0196d4871d5e526b913014f0ab13ba4e5d813b065dc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link disguised as a generator or hack for popular games, aiming to trick users into clicking it. The link leads to http://netcdn.tw/app/406889139/new-free-money-links-coin-master-game-hack, which likely hosts a malicious payload or phishing page. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/406889139/new-free-money-links-coin-master-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/how-to-cheat-at-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/best-hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-speed-hack-2021-may_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-shirt_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hacked-sitted_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-money-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-mac-cheat-engine_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/bear-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hack-be-other-players_GM431946152.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
font_00_sfnt_off00002fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE5 22968 bytes
SHA-256: d16a0c91adb0190da49fda1704f1c01e386d4401616f2c537edb8464fa901306
font_01_sfnt_off00006379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6379 18512 bytes
SHA-256: 984a3d9702b89b6e666262caaf4c06c2a05e614acf738958ff6740a8d55f6238