Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d69c707f1fe325…

MALICIOUS

PDF

47.7 KB Created: 2021-05-12 04:31:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7060482436ef1d2a39308cb93d4b7e3d SHA-1: 0fa0bd587335093c6613909b508399655ae361d0 SHA-256: 22d69c707f1fe3258deedcc655f7c399b1c268083790b98edbaa518cb481af0c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a document body that explicitly mentions 'free Robux' and 'game hack', indicating a lure for potentially malicious downloads or phishing. The PDF_SEO_LINK_FARM heuristic firing suggests a large number of external links were generated, likely to distribute malware or lead to scam sites. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.xyz/app/431946152/how-to-get-free-robux-without-downloading-apps-2021-game-hack
    • https://stroyzakazremont.ru/images/coin-master-apk-mod_GM406889139.pdf
    • https://stroyzakazremont.ru/images/lazyblocks-com-robux_GM431946152.pdf
    • https://stroyzakazremont.ru/images/coin-master-games-download-free_GM406889139.pdf
    • https://stroyzakazremont.ru/images/coin-master-free-spins-android_GM406889139.pdf
    • https://stroyzakazremont.ru/images/hack-coin-master-apk-mod_GM406889139.pdf
    • https://stroyzakazremont.ru/images/free-t-shirt-roblox_GM431946152.pdf
    • https://stroyzakazremont.ru/images/coin-master-free-spins-app-android_GM406889139.pdf
    • https://stroyzakazremont.ru/images/roblox-promo-code-to-get-free-robux_GM431946152.pdf
    • https://stroyzakazremont.ru/images/minecraft-realms-free-codes_GM479516143.pdf
    • https://stroyzakazremont.ru/images/no-human-verification-hack-for-coin-master_GM406889139.pdf
    • https://stroyzakazremont.ru/images/free-robux-discord-servers_GM431946152.pdf
    • https://stroyzakazremont.ru/images/free-spins-coin-master-app_GM406889139.pdf
    • https://stroyzakazremont.ru/images/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • https://stroyzakazremont.ru/images/coin-master-hack-online-without-human-verification_GM406889139.pdf
    • https://stroyzakazremont.ru/images/coin-master-hack-apk-download_GM406889139.pdf
    • https://stroyzakazremont.ru/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • https://stroyzakazremont.ru/images/coin-master-free-spins-apk-2021_GM406889139.pdf
    • https://stroyzakazremont.ru/images/ro-ghoul-script_GM431946152.pdf
    • https://stroyzakazremont.ru/images/how-to-get-100-robux-for-free_GM431946152.pdf
    • https://stroyzakazremont.ru/images/roblox-avatar-editor-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c52.bin
10a57872a270c8c12738c3c4a89c36d56aa4f3d5768f39f2e523eb629f3aead9
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C52 25524 bytes
font_01_sfnt_off00008755.bin
4889dc98a6bfd3c9244583f92387be58625a91e7a969778ad35ada89b27ed636
pdf-font-stream PDF embedded font (sfnt) at offset 0x8755 3084 bytes
font_02_sfnt_off000091fa.bin
dfaf102e4a8660aec521ea97dbe5e1677fef1ca2e266cad45ab84be3fc58cd38
pdf-font-stream PDF embedded font (sfnt) at offset 0x91FA 20276 bytes