Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2a069893dcf6c3…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 08:19:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c8c34915ab4c839487cb68ae603e1f6d SHA-1: 8c90813ef141012975e0e6b900554b407c3bda0e SHA-256: 3f2a069893dcf6c3e32b5c13d24c69fad2a5c32f0129235bfbda92568bf66a5b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/free-robux-no-human-verification-and-no-survey-game-hack PDF link annotation
    • http://vermaagri.com/uploaded_files/userfiles/files/roblox-how-to-hack-accounts-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/roblox-hack-pour-avoir-des-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/earn-free-robux-by-downloading-apps-and-completing-offers_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/roblox-robeats-cheat_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-robux-without-information_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/roblox-apocalypse-rising-dll-hack-downlaod_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/hack-para-cualquier-juego-de-rpg-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-free-download-app_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
font_00_sfnt_off00002c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C11 22084 bytes
SHA-256: ea7f12061b6ea2bce3ca4a578181f7a4a81d03169331ef22a409b9374fe85e42
font_01_sfnt_off00005d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D29 19800 bytes
SHA-256: fcd4d125090859beb8b270f882485097339e29693181c3776c14839bc9dcd643

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