Malicious PDF — malware analysis report

Static analysis result for SHA-256 81334e6f28ad8015…

MALICIOUS

PDF

32.8 KB Created: 2021-06-11 01:08:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 99f00fe3b8a0eaecd6a7f5aab000c977 SHA-1: 532ed29f88fafaf8b34c96bd59cf5f6990482ef4 SHA-256: 81334e6f28ad801545cced9544f228af0c8b74dbc8c25f1e3140775eb45006d4
74 Risk Score

Malware Insights

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

The PDF document contains multiple links that are designed to lure users into clicking on them by promising free in-game currency or hacks. The primary link directs to a site offering 'free robux websites no human verification 2021 game hack'. This type of lure is commonly used for phishing or to redirect users to sites that host malware. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious intent to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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/free-robux-websites-no-human-verification-2021-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005012.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5012 24252 bytes
SHA-256: ec82e2ceb11ef69b0326518c8026dda7cb0d78bf70c529a59b37d14937179b2b

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