Malicious PDF — malware analysis report

Static analysis result for SHA-256 6376b0697ac0c183…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 11:06:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e2901926426f16db96161500248731ac SHA-1: 7d3d03226fae30745daa23e7b57d5127ce07c53b SHA-256: 6376b0697ac0c1838bcb6152668fc4bc5f51c30fbc53d342cfd5d3105b0ee3d2
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack' and displays a fake CAPTCHA to trick users into interacting with it. It links to external URLs, one of which is a known redirector for game hack lures. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lead the user to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-coins-and-spins-blogspot-game-hack PDF link annotation
    • https://schaefer-rechtsanwaelte.com/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/get-robux-today_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/roblox-controversy_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://schaefer-rechtsanwaelte.com/images/free-coin-and-spin-for-coin-master_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_003_off00004aa2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA2 24752 bytes
SHA-256: 49f6ad3c3d8c293b7641a820b50ef470e3e855a2784a05935dbcfb1e60959294
font_01_sfnt_off000081ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EA 18636 bytes
SHA-256: 88ae2d3fcbda70c0dfe18bfa3c12f6e9cf10d469e04612efd9d0bb36059ec53b

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