Malicious PDF — malware analysis report

Static analysis result for SHA-256 50eff8281b894ca7…

MALICIOUS

PDF

34.8 KB Created: 2021-06-18 23:10:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9778b62502502c98ef1710ecd40a747c SHA-1: 2a54731e7ed4f9b1d9a9584a55e436e5a71750eb SHA-256: 50eff8281b894ca752c59ea2bdddeeb796a45d123aa2e17691bc57e1df10d0f2
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a primary URL that suggest a lure for downloading game cheats or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely intended to direct users to malicious or deceptive content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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/how-to-install-cheat-engne-for-roblox-game-hack PDF link annotation
    • https://opac.itp.ac.id/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/2021-robux-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/com-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-roblox-copy-any-roblox-game_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-make-any-purchase-in-roblox-free-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/2021-robux-hacks-no-games-to-be-played_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-account-hacker-tool-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-roblox-accounts-passwords-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000031af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AF 22220 bytes
SHA-256: 0f463a75087b3e765ef9f9f6fe706eac8a62a555f88d058f8786b2ac291334fd
font_01_sfnt_off000062dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DD 19084 bytes
SHA-256: f4efb7363ea3585bb9052d89038e9ee0cb0d50212258cf055e719709ab65fbc6

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