Malicious PDF — malware analysis report

Static analysis result for SHA-256 86823ba5d1dcf248…

MALICIOUS

PDF

36.0 KB Created: 2021-07-04 14:05:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a109b90d622ade5237b2e5019b8b38e8 SHA-1: 8e2117b76f3c6213ca86ca308a4557dbcab087ac SHA-256: 86823ba5d1dcf24824ac9d00fcea7118ec1bb5b341962260281f079f3a139c04
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free in-game currency and items for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for cheats or hacks. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-link-cheat-game-hack, likely leads to a malicious site for phishing or malware distribution.

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.tw/app/406889139/coin-master-free-spins-link-cheat-game-hack
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/minecraft-hacks-xbox_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/how-to-play-minecraft-online-for-free_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/moonactive-free-spins-2021_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/free-coin-master-spins-links-2021_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-free-spins-today-new_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/roblox-hack-2021-pastebin_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/minecraft-name-tag-hacks_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/how-to-instantly-get-free-robux-in-roblox-2021_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-cheats-2021_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/free-robux-working_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/roblox-walk-through-walls-hack-2021_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/hacks-para-roblox_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-hack-app-android_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/roblox-jailbreak-btools-hack-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000353e.bin
e399964b07c4b09020d1a40fa0cba1badf8a54368a4963820ccc3e02382e1771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x353E 23300 bytes
font_01_sfnt_off000069c2.bin
5a5a59f64de48c72dd3bef22588d8b1a643877c32e364421157886632419d7f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C2 18512 bytes

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