Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b84807b815284b…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 15:25:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 51559c8200745343bc6b82c07d3f3522 SHA-1: d5ab56e98b5bd53a8b9f2f078e53c793a81b506e SHA-256: c9b84807b815284b7d4559eb49cf4726d03f2087f3601d0270da35c718607791
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 0.9864

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.online/app/479516143/minecraft-windows-10-hacks-game-hack PDF link annotation
    • https://www.themerchantshouse.co.uk/uploads/files/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/minecraft_GM479516143.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/rbx-earn_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/roblox-free-printables_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/pokemon-go-free-app_GM1094591345.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.themerchantshouse.co.uk/uploads/files/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://code.giftcards.comIn 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_004_off000053c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C8 25372 bytes
SHA-256: c8918e8e778af8b2621559d29a5683ed8d121f9c872fc9264bc01ebf01394ef5
font_01_sfnt_off00008e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3F 18696 bytes
SHA-256: 14f86b407040f424958936cb2b2b49b26067a8980bd50a77917f0563cc1bff87