Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f33c7475a664f7…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 08:24:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a250c1d76e7515e0017b92602be99c31 SHA-1: 661e34a9e16b6c945d5f1e1c94f92ac1744ebbb8 SHA-256: 98f33c7475a664f773cc464029305a251b89aac6819636d0027924680466b6cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure for game hacks and generators, likely intended to lead users to phishing or malware download sites. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-do-you-get-free-food-in-coin-master-game-hack In PDF document text
    • http://www.copoint.co.uk/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-hack_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-facebook-free-spins_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_off00004b06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B06 24672 bytes
SHA-256: b289e10b3d1697b2337191bc9db5be99f8b883597a6c3777e4f790c241bff1ed
font_01_sfnt_off000083bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BC 18516 bytes
SHA-256: ac91f58e21dbb93fb64f3a3444140cfe582f485122f2f3fe207e1bd010819bf3

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