Malicious PDF — malware analysis report

Static analysis result for SHA-256 5397e3341d812e3a…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 18:27:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b1926d216bcca40f9f68ad245cbf3bf3 SHA-1: c9ac03adb300a73de84ea874d2fc8d5869500932 SHA-256: 5397e3341d812e3a25ec3ded8617577a4fdc573563b2d984615f493816861c01
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was identified as malicious by an ML classifier and contains numerous external links, many of which are SEO-optimized lures for free in-game currency for games like Roblox and Coin Master. The document body itself contains these links and mentions 'free robux', indicating a phishing or scam attempt to trick users into clicking malicious links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-free-robux-working-2021-game-hack
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-easy-on-roblox_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-vip-server-roblox-battle_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/elemental-wars-hack-roblox_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-give-robux-on-mobile_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-apk-mod_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/secure-payment-with-roblox-free_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-account_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-daily-free-spins_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-coin-master-cards_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/robux-hack-no-survey-no-password_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-cheat_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-easy-2021-pc_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-hack-without-downloading-apps_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-no-apps-needed_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/roblox-glitch-how-to-get-free-clothes_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/roblox-gift-card-online-free_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/roblox-hacked-told-my-account_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/roblox-hack-download-unlimited-robux_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-2021-april_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000309a.bin
108c22bd7751701620b07548991e561a408fff51c6ae89c78fa0c2b757d9d413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 22244 bytes
font_01_sfnt_off000061bd.bin
c83ff41fd68b9a0e886e44857efed6362fe8b827c03a5b3f7f0606aa4763a2b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BD 19680 bytes

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