Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8dabd6c21455bdd…

MALICIOUS

PDF

40.2 KB Created: 2021-04-23 20:03:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0ee2cb957a24bdeeec827d2f083ffa01 SHA-1: 8c9061774905a78a25616e724dd11faf267cb037 SHA-256: e8dabd6c21455bddffecd11b8fef0385e89ad714bded3f2f27fc75fb89e461f6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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://netsecure.top/app/431946152/roblox-got-talent-piano-hack-game-hack PDF link annotation
    • https://bioscience.kyst.com.tw/image/data/files/robux-hack-that-isnt-fake.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-online-no-verification.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/real-roblox-free-robux.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-hack-roblox-jailbreak-on-mac.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-cheats-for-tix-2021.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/robuxy-com-free-robux.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/black-tshirt-roblox-free.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-make-an-aimbot-hack-in-roblox-phantom-forces.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-hack-funnehcake-on-roblox.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-roblox-membership-for-free.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000411c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x411C 24892 bytes
SHA-256: 90cb0bfa70f3e393bfbd41edd45dd050018ffb266c01c1fba53be30db2910a9f
font_01_sfnt_off00007a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A87 18560 bytes
SHA-256: 718cc2b062ab6cfaeb2a411bf3639d4ddcb64813a44b35fc4dc4c297fc3c3153

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