Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2a2815ebadd00d…

MALICIOUS

PDF

43.8 KB Created: 2021-05-11 13:09:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 063672ae33227f0bb56c77b1d03c724e SHA-1: a9cae72241439d3f989c92f3592a90bda979e1ee SHA-256: 6f2a2815ebadd00dd19423b0ab460d78ad5cd394d7f0709a9843d6514ddc1d69
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to attract users with promises of free in-game items or hacks. The ML classifier strongly indicated maliciousness, and the presence of a call-to-action phrase further supports a deceptive intent. The primary URL, https://netcdn.xyz/app/431946152/who-to-get-free-robux-game-hack, is likely the intended destination for users seeking these illicit benefits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/who-to-get-free-robux-game-hack
    • http://web.smkn1indramayu.sch.id/e-lib/repository/ear-free-spins-for-coin-master_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-spin-coin-master-new-link_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-games-like-coin-master_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-spins-for-today_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-minecraft-wallpaper_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-robux-without-paying_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/http-blackgamesus-coinmasterhack_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-generator-2021_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/roblox-how-to-get-free-clothes_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/blox-pink-robux-free_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/minecraft-login-free_GM479516143.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-hack-version-2021_GM406889139.pdf
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004acf.bin
956b61921ebbb7a797a8810239aca50258a3ba699b628b92c628a2911d2bb4d4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACF 27248 bytes
font_01_sfnt_off00008841.bin
7ba6f7de64c6d8ae6f5469fb20d9bd46bb355649f5c0a9ce8a2cee34149577d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8841 18484 bytes

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