Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8cb84e3d41680ec…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 12:54:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cab0935cf5978a505fe0f323faf53ac0 SHA-1: 69e48cb1b7c74d8183d8a160ea17070957b8deb7 SHA-256: f8cb84e3d41680ec6ffc8fd328355ccd915720397c227dea0ec5e139af7fca19
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'http://netcdn.co/app/431946152/blox.land-where-you-get-free-robux-codes-game-hack'. The document body also contains this URL and related keywords like 'Free Robux', suggesting a lure for users interested in gaming-related exploits. The ML classifier also flagged this PDF with high confidence. The presence of embedded URLs and the nature of the content strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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.co/app/431946152/blox.land-where-you-get-free-robux-codes-game-hack In PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/bux-gg-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-roblox-fortnite-gameplay_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/get-any-item-in-the-roblox-catalog-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/comment-avoir-le-free-skin-de-strucid-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/robux-free-roblox-glitch_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/karinsupersweet-offers-200-000-robux-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-suit-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-do-you-speed-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/flame-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-robux-hack-apk_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-free-copy-place-service_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-knife-ability-test-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/hot-to-get-free-robux-2021-may_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-phase-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCA 22632 bytes
SHA-256: 810448193bfe12956acabf7784cd6eca4b75a42ec21e8df354cf673fa436e635
font_01_sfnt_off00006219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6219 19660 bytes
SHA-256: d39b634cd7d4b93820f17e838c71f4b017c3073cc08b719ca540953724d4d8cd

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