Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c4b1f9244df193…

MALICIOUS

PDF

42.3 KB Created: 2021-05-20 06:42:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8cb46b68e65ca1573f80e745fa2447c1 SHA-1: 13b7d5445a1a5bccd61436b5aa66be0c2e6590ba SHA-256: 16c4b1f9244df193f27005bce6ebe2173c68d54cde42e43de2f0aa716fd5fc64
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 0.9971

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 https://netcdn.xyz/app/479516143/hacks-for-minecraft-windows-10-game-hack PDF link annotation
    • https://www.hotel-forsthaus.com/images/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/google-moon-active_GM406889139.pdfIn PDF document text
    • https://www.hotel-forsthaus.com/images/coin-master-34-4-free-download_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_off0000486d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486D 24952 bytes
SHA-256: 3883fd8ddaf8dd4b8af7200469e99453e8da396e07d0b114373c28f291876e65
font_01_sfnt_off000081c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C8 18696 bytes
SHA-256: cd39c091a68a2846e65319e0aedb696a747600c4d9ed3e222f28c6d266d57a0c

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