Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b26a4aec0705ff1…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 16:24:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cd38731625751751e8364df5d0a35cc2 SHA-1: 12fba41e0c33261da4f2fedf203f50867b275d58 SHA-256: 8b26a4aec0705ff1e423df720adbe362987c4cd7f5e94a03b8199100ba7347ba
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are SEO-optimized slugs pointing to game-related hacks and currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a large number of external links suggests a link farm or phishing attempt. The document body and extracted URLs indicate a lure for users seeking game cheats, likely leading to malware or further phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-hack-2021-ios-download-game-hack
    • https://dirigentigiustizia.it/images/get-free-robux-no-human-verification_GM431946152.pdf
    • https://dirigentigiustizia.it/images/free-robux-link_GM431946152.pdf
    • https://dirigentigiustizia.it/images/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://dirigentigiustizia.it/images/how-to-get-robux-easy_GM431946152.pdf
    • https://dirigentigiustizia.it/images/coin-master-daily-spin-link-app_GM406889139.pdf
    • https://dirigentigiustizia.it/images/roblox-avatar-com_GM431946152.pdf
    • https://dirigentigiustizia.it/images/all-links-for-free-spins-coin-master_GM406889139.pdf
    • https://dirigentigiustizia.it/images/coin-master-32-mod-hack-apk-download_GM406889139.pdf
    • https://dirigentigiustizia.it/images/earn-free-robux-for-roblox_GM431946152.pdf
    • https://dirigentigiustizia.it/images/free-minecraft-account-and-password-generator_GM479516143.pdf
    • https://dirigentigiustizia.it/images/robux-hack-tools_GM431946152.pdf
    • https://dirigentigiustizia.it/images/easy-robux-hack_GM431946152.pdf
    • https://dirigentigiustizia.it/images/robux-in_GM431946152.pdf
    • https://dirigentigiustizia.it/images/free-robux-android_GM431946152.pdf
    • https://dirigentigiustizia.it/images/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • https://dirigentigiustizia.it/images/coin-master-spin-hack-no-human-verification_GM406889139.pdf
    • https://dirigentigiustizia.it/images/boost9-com-roblox-hack_GM431946152.pdf
    • https://dirigentigiustizia.it/images/oprewards-free-robux_GM431946152.pdf
    • https://dirigentigiustizia.it/images/coin-master-links-to-free-spins_GM406889139.pdf
    • https://dirigentigiustizia.it/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • https://coinmasterspinandcoin.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004974.bin
608a66d281e1ab7fdeee7af2f110a57df242be0260b52ce119cbab74a5c1dc2c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4974 24536 bytes
font_01_sfnt_off0000819c.bin
ceb680829dad7f80d00f8486b75e8ff3e84f80ef9ad40f876ac7c87b6bf6814b
pdf-font-stream PDF embedded font (sfnt) at offset 0x819C 18696 bytes