Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ed7ff00fc4534e…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 02:15:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 20bb055b44da44fb5c2077e599303a7f SHA-1: 983083072e208100832d3acc73b531b2bd92fdff SHA-256: 83ed7ff00fc4534e846cc8eda2f81e2e24c378cbce0a9fed9455fb6e592ba9b2
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways. The primary URL, http://netcdn.co/app/431946152/copy-and-paste-free-robux-game-hack, suggests a lure for free game currency or hacks. The presence of a 'download button' heuristic further supports the intent to trick users into downloading malicious content. The ML classifier strongly indicates maliciousness, and the overall structure points to a link-farming or phishing attempt.

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/copy-and-paste-free-robux-game-hack
    • https://pa-waingapu.go.id/images/how-to-script-roblox-games-hacking_GM431946152.pdf
    • https://pa-waingapu.go.id/images/today-free-spin-coin-master_GM406889139.pdf
    • https://pa-waingapu.go.id/images/how-to-hack-roblox-with-inspect-element-no-blogspot_GM431946152.pdf
    • https://pa-waingapu.go.id/images/hack-mod-coin-master_GM406889139.pdf
    • https://pa-waingapu.go.id/images/adopt-and-raise-a-cute-kid-hack-script-roblox_GM431946152.pdf
    • https://pa-waingapu.go.id/images/how-to-get-free-robux-and-tix-in-5-minutes_GM431946152.pdf
    • https://pa-waingapu.go.id/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdf
    • https://pa-waingapu.go.id/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdf
    • https://pa-waingapu.go.id/images/minecraft-apk-free-download-016-0_GM479516143.pdf
    • https://pa-waingapu.go.id/images/free-noob-hat-roblox_GM431946152.pdf
    • https://pa-waingapu.go.id/images/roblox-studio-free-robux_GM431946152.pdf
    • https://pa-waingapu.go.id/images/how-to-win-free-robux_GM431946152.pdf
    • https://pa-waingapu.go.id/images/free-spins-coin-master-legit_GM406889139.pdf
    • https://pa-waingapu.go.id/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://pa-waingapu.go.id/images/free-robux-no-offers_GM431946152.pdf
    • https://pa-waingapu.go.id/images/free-spin-link-coin-master_GM406889139.pdf
    • https://pa-waingapu.go.id/images/how-to-hack-to-get-robux_GM431946152.pdf
    • https://pa-waingapu.go.id/images/robux-free-online_GM431946152.pdf
    • https://pa-waingapu.go.id/images/coin-master-money-hack_GM406889139.pdf
    • https://pa-waingapu.go.id/images/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030b3.bin
986027788135f39a210be6e22cd5a609e1d855d1ed9719a8313f2341e886d70a
pdf-font-stream PDF embedded font (sfnt) at offset 0x30B3 21920 bytes
font_01_sfnt_off00006108.bin
598e3c30126ca61f5f6ae8b6f1956ff19794c3a95cd566bf30ae7d49090dbafa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6108 19320 bytes