Malicious PDF — malware analysis report

Static analysis result for SHA-256 c153d0d80b146444…

MALICIOUS

PDF

36.0 KB Created: 2021-06-30 07:26:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2359ddc40c0048baea2811cdacb6849b SHA-1: 40e39f2deb7e6fc49020baba852a8924e1436d1c SHA-256: c153d0d80b1464443ebc38a88b05deeb9ac65c83931d79b76918ddbf0af23d7f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by an ML classifier and contains numerous embedded links to external resources, many of which are SEO-optimized PDFs related to game cheats and hacks. The primary URL http://netcdn.co/app/431946152/roblox-simulator-free-model-game-hack likely serves as a download or redirect to a malicious payload. The document's structure and content suggest a phishing or social engineering attempt to trick users into downloading unwanted software.

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.co/app/431946152/roblox-simulator-free-model-game-hack PDF link annotation
    • https://perpustakaan.stifar.ac.id/repository/roblox-btools-hack-august_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/seitama-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-free-weapons_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/cheats-for-pizza-place-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-hacker-tucoon_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-final-stand-2-cheat_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-i-hacked-place-rebuilder_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/get-any-roblox-item-for-free-new-2021-working-legit_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-dll-hacks-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-connect-to-xo-s-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/get-free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-dreamscape_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-roblox-auto-farm_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/auto-clicker-free-roblox-shinobi-life_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/flee-the-facility-roblox-hack-exploit-gui_GM431946152.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_off00003212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3212 23472 bytes
SHA-256: ad3b87ff5c407ca0d0fabf229a165d996ed6f1494cb97251f021809fcf2fd682
font_01_sfnt_off0000661b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 19644 bytes
SHA-256: 721377f4b8ad477511c85aff64d4e05b9237b1b7636e28c860ed20695f25c88f

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