Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca66299fb1bcbae…

MALICIOUS

PDF

49.1 KB Created: 2021-05-13 20:11:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 62f47ea251e8f897a294ad469181ac55 SHA-1: ccc75c28994ca6730d0523b362f0c7dda0c89481 SHA-256: 1ca66299fb1bcbae0de090e55425b4b5f216d2295584c12de726c1fbfacc8704
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator' or 'game hack', directing users to a URL that likely hosts malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious site, potentially for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/431946152/free-roblox-generator-for-roblox-game-hack PDF link annotation
    • https://www.gymun.cz/images/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/rbx-com_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000484b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484B 25060 bytes
SHA-256: 4aee1d0d6594155ea3e01b39cbd115fc8d3af48263addb1965c3fb98b9d2177f
font_01_sfnt_off0000827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 8132 bytes
SHA-256: e6d68e720ea5acf9dccbf7ffde18db6f65c62a99ab7725aa43e30329033a7787
font_02_sfnt_off00009d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D6A 18280 bytes
SHA-256: a933d21998376b1e1789d4c480c6983ef3f135197d1bc74c37b8b8f8713ff5e6

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