Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f7478a5d131eac…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 13:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3a84928bf2578280dfba7245c7504cab SHA-1: 5cf72be41382df77cab4f112ac9e04ae626dd959 SHA-256: 93f7478a5d131eac598b418a7e9c6d812ab8294c5dcc880163f1c9a6d25c520c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are related to game hacks and in-game currency, suggesting a lure for users to download potentially malicious content. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, and the ML_NYX_PDF_MALICIOUS classifier strongly suggests malicious intent. While no scripts were directly extracted, the structure and content point towards 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/best-admin-hack-roblox-game-hack
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-not-a-scam_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-do-you-get-robux_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-hack-2021_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-hack-that-actually-works_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/cheat-buddy-roblox-download_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/https-web-roblox-com-hack_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-someone-on-roblox-2021_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/hack-niveau-roblox-slaying-simulator_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-cheat-robux-2021_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-for-free-without-signing-in_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-to-get-roblox-money_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-game-hack-link_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-place-rewards_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/comment-hack-roblox-prison-life_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/unlimited-robux-2021_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/youtube-free-robux-and-obc_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003039.bin
f7c7a3094ae245649851de01a05ebb18b554a5fc5c4f1578836327cf47f3bd70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3039 22168 bytes
font_01_sfnt_off0000614b.bin
ed771723c641fd0367239fcb7aba5c754a77a041ed4043cfb5ed9ced94ee1261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 19316 bytes

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