Malicious PDF — malware analysis report

Static analysis result for SHA-256 b042cd357853f902…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 20:51:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5fd33bf50fd135011d253ed8e245435d SHA-1: f13fa80652d580a2f42818355b64657b1bdbd284 SHA-256: b042cd357853f902887d6adea3b9a90263491f686b3ae0540ce9674c8200ff6a
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a prominent external URI pointing to a site offering 'free Robux'. The ML classifier strongly flagged this PDF as malicious, and the presence of download lures and callback phishing indicators further supports a malicious intent. The document likely serves as a lure to download a second-stage payload or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://netcdn.co/app/431946152/free-robux-rxgate.cf-game-hack
    • https://www.dc-itsolutions.com/userfiles/files/free-free-free-free-robux_GM431946152.pdf
    • https://www.dc-itsolutions.com/userfiles/files/1x1x1x1-roblox-id_GM431946152.pdf
    • https://www.dc-itsolutions.com/userfiles/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • https://www.dc-itsolutions.com/userfiles/files/minecraft-hacked-client-download_GM479516143.pdf
    • https://www.dc-itsolutions.com/userfiles/files/minecraft-pe-free-apk_GM479516143.pdf
    • https://www.dc-itsolutions.com/userfiles/files/pubg-uc-94fbr_GM1330123889.pdf
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-spin-hack-link_GM406889139.pdf
    • https://www.dc-itsolutions.com/userfiles/files/rbx-hut-promo-codes_GM431946152.pdf
    • https://www.dc-itsolutions.com/userfiles/files/can-you-play-minecraft-for-free_GM479516143.pdf
    • https://www.dc-itsolutions.com/userfiles/files/is-windows-10-minecraft-free_GM479516143.pdf
    • https://www.dc-itsolutions.com/userfiles/files/static-moonactive-net-free-spins_GM406889139.pdf
    • https://www.dc-itsolutions.com/userfiles/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdf
    • https://www.dc-itsolutions.com/userfiles/files/archery-master-3d-coins-hack_GM406889139.pdf
    • https://www.dc-itsolutions.com/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • https://www.dc-itsolutions.com/userfiles/files/op-rewards-free-robux_GM431946152.pdf
    • https://www.dc-itsolutions.com/userfiles/files/gameoffice-net-hack-coin-master_GM406889139.pdf
    • https://www.dc-itsolutions.com/userfiles/files/get-more-robux_GM431946152.pdf
    • https://www.dc-itsolutions.com/userfiles/files/minecraft-hacks-xbox-one_GM479516143.pdf
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://www.dc-itsolutions.com/userfiles/files/free-minecraft-skins-pc_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f28.bin
71d0a2aaa7e7d0edec14c8ae63831da3e9d91b366b5abc9c43ff7ead2cd8ea3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F28 22516 bytes
font_01_sfnt_off0000618c.bin
85daeb0d27a6bec5f1cf01c7475fd41468cce1781ea6355bc2fb0b722d589514
pdf-font-stream PDF embedded font (sfnt) at offset 0x618C 18888 bytes