Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3de2697b747b6e…

MALICIOUS

PDF

43.5 KB Created: 2021-05-17 09:10:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8dfbf863c810f57c3b05b15e30cec890 SHA-1: eaa9159462d2b6244749d4a9bf529f31ee4e2c21 SHA-256: ab3de2697b747b6e4586de5a7c22b1f757f328ab47f12aacd92dc3ce54170942
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that link to websites offering game hacks and cheats, suggesting a lure for users to download potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the ML classifier strongly flagged the document as malicious. While no scripts were explicitly extracted, the document's structure and embedded links point towards a phishing or social engineering attack.

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/406889139/coin-master-free-spins-hack-but-no-surveys-game-hack
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-minecraft-mods-for-pc_GM479516143.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/real-free-robux-generator_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-hack-in-arsenal_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/spin-coin-master_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/today-free-spin-coin-master_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/roblox-free-hats_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/coin-master-free-2021_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-robux-obby-2021_GM431946152.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-moonactive_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/minecraft-free-download-mac-full-version_GM479516143.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/gaming-dunia-coin-master-free-spins_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/free-coins-and-spins-coin-master_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/game-toolbox_GM479516143.pdf
    • https://elearning.man1samarinda.sch.id/__statics/gudangsoal/files/coin-master-support_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f04.bin
d42c20f711168a685916bb85b89dbd3e34e2745fa6c09207878214e1c06403ee		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F04 24612 bytes
font_01_sfnt_off00008663.bin
e0937bcd33a3b629f0687db8d98eacd8293f1078019919402bc9ac6e2a33e1b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8663 18708 bytes

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