Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b5c20de3449d70…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 21:12:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 63ab3851c80aa82f44fac296b1aa0b76 SHA-1: d679d7e5643430116f0e6528d8e9529d4d9b523c SHA-256: 57b5c20de3449d703f8eabf54fbcffa7147b9ccbc5a1c6fa0645a1c5779236f8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are SEO-optimized and appear to be part of a link farm. The document body and extracted URLs suggest a lure for game-related cheats or hacks, specifically for Roblox and Coin Master. The presence of a 'PDF_SEO_LINK_FARM' heuristic and a high ML score indicates a strong likelihood of malicious intent, likely to drive traffic to malicious sites or distribute further malware.

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.co/app/431946152/free-fedora-roblox-game-hack
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/what-is-the-best-free-game-script-executor-roblox_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/hack-of-robux-roblox_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/free-red-jacket-roblox-that-is-actually-free_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-free-download-for-pc_GM406889139.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-just-with-a-app_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-2021-free-spins_GM406889139.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/robux-codes_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/roblox-free-accessories_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/counter-blox-roblox-offensive-hack-script_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/minecraft-116-apk-download_GM479516143.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/free-spins-coin-master-october-13-2021_GM406889139.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/free-robux-easy_GM431946152.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdf
    • https://elearning.maputripuitalaga.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003200.bin
49dc0c58a8cfcdc3974c992d0e2a2f31d8c8b8464ebf87277088acb78c8e0765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3200 22432 bytes
font_01_sfnt_off000063ff.bin
caa4b5ea2079a4d4a4a9fd946a8eacda792ace40c2cb6862030af494931620c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FF 18824 bytes

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