Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a11106d0d2e1028…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 01:36:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d2de6ff8ad53b8073c6fb59343c3c28f SHA-1: c6b0bec9ce0dac32ab989cb7163481c1cf2221b4 SHA-256: 6a11106d0d2e1028e29e2406b54c2b44e93d19087812cf3bb9a12b5fe8d9725b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free in-game currency to entice users. It contains multiple embedded URLs that point to redirectors and other PDF files, indicating a likely multi-stage download or phishing campaign. The ML classifier strongly flagged this PDF as malicious, and heuristic rules identified it as a redirector link and a game hack lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/479516143/minecraft-fly-hack-game-hack In PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-apk-download_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/roblox-free-pets-in-pet-simulator_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/cheat-manager-free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/pokemon-go-free-storage-upgrade_GM1094591345.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/i-got-hacked-playing-roblox-in-real-life_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-online-games-like-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/rbx-sites_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-coins-and-spins-coin-master_GM406889139.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
font_00_sfnt_off00003220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3220 22700 bytes
SHA-256: efb3048b0152c457fc5c5877cb5a1e1c1a066c6f21f25071453bd004fa77239f
font_01_sfnt_off000064f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F3 18280 bytes
SHA-256: 56f87322d6175f5188b2f3e54b3290a6e5898c7bed8f3d8c577e55e984b17e01

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