Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eea76c8b9e7c6dc…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 18:55:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7deb554d34f9897b2d11d9eb89b0ca61 SHA-1: ddd3a4d4b408845a52de6f17a8f045c6899e5c1f SHA-256: 1eea76c8b9e7c6dc558aff855980dfd33cc478181c9a3b34427b6344e71d6a81
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are SEO-optimized and related to 'free Robux' or 'Roblox hacks'. The primary URL http://netcdn.tw/app/431946152/free-robux-2021-no-offiers-game-hack likely serves as a landing page for a malicious download or exploit. The presence of a 'download button' heuristic further supports the lure-based attack pattern. Although no scripts were explicitly extracted, the nature of the links and the ML classifier's high confidence suggest a malicious intent to trick users into downloading malware.

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.tw/app/431946152/free-robux-2021-no-offiers-game-hack
    • https://i-tech.ac.id/perpus/repository/free-robux-generator-no-download-no-survey-no-human-verification_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-hack-roblox-to-get-free-robux-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/cheats-robux-hack-free-money_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/fly-hack-roblox-no-cheat-engine_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-free-robux-ad_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/paper-mario-roleplay-roblox-cheat-engine_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-clothes-codes-for-roblox_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/javascript-free-robux_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-hack-fliight_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/robux-hack-2021-free-robux-generator_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-roblox-game-passes-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/easy-ways-to-get-robux-for-free-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/hack-roblox-with-this-edit-cookie_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/all-mobile-roblox-hacks_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-robux-websites-no-human-verification_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/block-free-purchase-roblox_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-secret-free-items_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-hack-a-roblox-account-2021-easy_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-counter-blox-roblox-offensive-hack-download_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-free-rare-accounts_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dcd.bin
8aab5580232511814726b045b2e7f739539cdd69e59f5309d26cf2d93f143687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCD 21820 bytes
font_01_sfnt_off00005ddb.bin
bb79c46d18b41f6396a105c132229641a5831be3072fe363e2d00f4f28fe1f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDB 19240 bytes

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