Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ca63a9de7983a8…

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 20:12:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8656ce5b617274f08fc80968a6bce386 SHA-1: 4b9ec9ef8bfcd637710304875784baf0c40e25b1 SHA-256: 09ca63a9de7983a8aa91f2e4f91d4578e3864d2f05cf2fe8a0c72ce390c08e4e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one pointing to a 'game hack' lure. The ML classifier also flagged this PDF as malicious. The presence of these lures suggests the document is designed to trick users into visiting malicious sites, likely for credential harvesting or to download further malware. No scripts were extracted, but the document structure and embedded URLs indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/roblox-play-for-free-without-downloading-game-hack PDF link annotation
    • https://financia-business-school.com/static/upload/files/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/cheat-roblox-jailbreak-installer_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-free-catalog-items-2021_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-raid-hack_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_off00002c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C74 22316 bytes
SHA-256: c4e871d0f4c8e16c55a6887cdc329e12e26df8f8353e09d24b62489f082c9ca4
font_01_sfnt_off00005d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D29 20220 bytes
SHA-256: d754128f5fe7136a8c931940817e47d594cfa0a7d4e52c02dff6f2a793a666ff

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