Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7e1fe65890c12c…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 05:14:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 75cc768383d38ab690286f4040a29cd7 SHA-1: d70fabde7489193910c93273bb7eae44dc5ab8d4 SHA-256: bf7e1fe65890c12c86677cb8dd7b312cc13fc18301ed0f162268e8bfadab46cb
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that link to sites offering game cheats and hacks, indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports the malicious intent. The document's content and structure suggest it is part of a link farm designed to distribute malware or lead users to phishing sites.

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-free-gear-codes-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-bots-roblox-games_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-robux-hack-apk-download_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-on-roblox-apocalypse-rising-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/robux-hack-code-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/i-think-i-just-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/uirbx-club-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/rbxnow-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-114-4-download-free_GM479516143.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_off00002f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7B 22112 bytes
SHA-256: bec93cdd370932bd43d3f3370944e995a202a77aa16b4eab6c5bcd92c391b6e4
font_01_sfnt_off0000608a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 18824 bytes
SHA-256: d3a5d1c2574de61db5362f063b53a5175c9e60bbd10fd84a2be073132aba39d9

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