Malicious PDF — malware analysis report

Static analysis result for SHA-256 481545669f342a75…

MALICIOUS

PDF

40.8 KB Created: 2021-05-11 23:01:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 46464b72901398f6efe0d05e979b310a SHA-1: 0e17c60555cff4e4639cf80402087da00681bda4 SHA-256: 481545669f342a75f4e1afe1adf079eb2a3f0d8c8113c8c8f5b59194ebc5810e
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 structured as a link farm. The primary URL, https://netcdn.xyz/app/406889139/spin-free-coin-master-game-hack, suggests a lure related to game hacks or cheats. The presence of a ML classifier flagging the PDF as malicious and the sheer volume of generated SEO-like links indicate a high likelihood of malicious intent, possibly to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/spin-free-coin-master-game-hack
    • http://perpustakaan.pn-raha.go.id/repository/roblox-hack-site_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/games-like-minecraft-but-free_GM479516143.pdf
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/roblox-redeem-card-codes-free_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/master-coin-free-link_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-daily-spins_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/get-free-coins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/where-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-multiplayer-free_GM479516143.pdf
    • http://perpustakaan.pn-raha.go.id/repository/mobihack-roblox-hack_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/how-to-earn-free-robux_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-online-without-human-verification_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/robux-generator-without-human-verification_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/roblox-online-free_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-for-free_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/hack-para-coin-master-singapore_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-links-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000480d.bin
4ca4aa52c210f0f7f115f9a7d0c8ae482f4643322dc239dec1a5005f72e43439		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480D 23904 bytes
font_01_sfnt_off00007e17.bin
62d9ea50f60e8bb2d525932cb0bed6ec72f3825d2169fb999e19ba134a7219cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E17 17884 bytes

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