Malicious PDF — malware analysis report

Static analysis result for SHA-256 a305474d06891713…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 15:32:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5697b907484198fda8ea61f300cf79b3 SHA-1: ebfe15d39dabab76621e0e3632ad1b59d593ec77 SHA-256: a305474d06891713f395510813f386e99cbfa87581b54250be16e8c741f0fae1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, pointing to sites offering game cheats and free in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a lure to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a social engineering attack aiming to redirect users to external resources.

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/479516143/best-minecraft-hacked-client-game-hack
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/hackear-coin-master-sin-root_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/spin-free-coin-master_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/win-free-robux_GM431946152.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/minecraft-hacks-wurst_GM479516143.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-hack-coins-in-archery-master-3d_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-haktuts_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-400-spin-link-today_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/minecraft-handbook_GM479516143.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-hacks-for-free-spins_GM406889139.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-do-i-get-robux-on-roblox_GM431946152.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-roblox-dominus_GM431946152.pdf
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-coins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cd0.bin
f2704ac497fde82f322e4017237f1ead095abadb271f917a1e48bf190afab166		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD0 25336 bytes
font_01_sfnt_off000085ff.bin
05f9c4237b996275e109c4becad50b5cb7d88affc4d3e55964976ee2f9eee8f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85FF 18200 bytes

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