Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fde974e94c8bed…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 06:56:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 065cfeabd20d6e3f8373aba0117903a2 SHA-1: 538d645b3920a1dd947e2cb7a4f9a1d32ce27f68 SHA-256: 01fde974e94c8beda2ec65d5f0d58f20d86cd368563ea7527de0080a28fc04c8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many of which point to other PDF files hosted on the same domain, suggesting a link farm designed to attract users searching for game-related cheats or hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent. The primary goal appears to be directing users to download potentially harmful files disguised as game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/como-descargar-roblox-hackeado-con-robux-game-hack
    • http://force-seniorklub.dk/images/promo-codes-for-free-robux_GM431946152.pdf
    • http://force-seniorklub.dk/images/free-minecraft-coloring-pages_GM479516143.pdf
    • http://force-seniorklub.dk/images/coin-master-invite-friends-hack_GM406889139.pdf
    • http://force-seniorklub.dk/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://force-seniorklub.dk/images/free-vpn-for-minecraft_GM479516143.pdf
    • http://force-seniorklub.dk/images/free-coin-master-spins-daily_GM406889139.pdf
    • http://force-seniorklub.dk/images/free-robux-no-gift-card_GM431946152.pdf
    • http://force-seniorklub.dk/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://force-seniorklub.dk/images/minecraft-multiplayer-free_GM479516143.pdf
    • http://force-seniorklub.dk/images/roblox-free-bc-hack_GM431946152.pdf
    • http://force-seniorklub.dk/images/buy-robux-free_GM431946152.pdf
    • http://force-seniorklub.dk/images/coin-master-deals_GM406889139.pdf
    • http://force-seniorklub.dk/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdf
    • http://force-seniorklub.dk/images/free-daily-spins-coin-master_GM406889139.pdf
    • http://force-seniorklub.dk/images/roblox-hack-2021_GM431946152.pdf
    • http://force-seniorklub.dk/images/roblox-lumber-tycoon-2-how-to-get-free-land_GM431946152.pdf
    • http://force-seniorklub.dk/images/coin-master-daily-spins-and-coins_GM406889139.pdf
    • http://force-seniorklub.dk/images/codes-to-get-free-robux_GM431946152.pdf
    • http://force-seniorklub.dk/images/free-gold-cards-for-coin-master_GM406889139.pdf
    • http://force-seniorklub.dk/images/coin-master-official-website_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005210.bin
6db05ff2e68c6aef3b2dd9a5cb4bfea92f19ca241d3e72a1406b6cec24ac7a4b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5210 25776 bytes
font_01_sfnt_off00008ce9.bin
b0758d169d47c2ade5037ef2cc9cf9dc120d0c60714949bbf316895b8aba5dd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE9 19212 bytes