Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd40cc935b50ea4…

MALICIOUS

PDF

46.7 KB Created: 2021-06-13 21:48:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6c2f841b49f93b123bc5dc41a174d694 SHA-1: ba19df6b6252bd21619d849d782de50dd60ec185 SHA-256: 4fd40cc935b50ea405430a2ea37ee2af7efad9f27a2c691850dc414bea47a1f6
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to files with names suggesting game cheats or generators, and includes a fake CAPTCHA lure. This indicates an attempt to trick the user into clicking a link and potentially downloading a malicious payload. The primary URL observed is http://netcdn.co/app/431946152/slaying-simulator-roblox-no-cheat-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/slaying-simulator-roblox-no-cheat-game-hack PDF link annotation
    • http://perpustakaan.iahntp.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/hot-to-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-tiktok-followers-generator-no-human-verification_GM835599320.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-roblox-places-in-roblox-studio-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-code-genorator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-make-a-cool-free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/hackear-el-roblox-med-city-noma_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8A 25764 bytes
SHA-256: 16d57f9e8403cd7678d76d6ecfa31aa038c4e967018fbebe11d7a77c4518e0ba
font_01_sfnt_off00008612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8612 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off0000913c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913C 19272 bytes
SHA-256: 6e3a70bb1c8908357f7855401e35e2df2075f74d983b79232a60cb376dc08c3a

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