Malicious PDF — malware analysis report

Static analysis result for SHA-256 4202503c7103bf39…

MALICIOUS

PDF

46.5 KB Created: 2021-05-16 02:01:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 38ebe1ac77783bcfeede62117eee20c9 SHA-1: 28b5cbeebf7df7794f541a0917543ec35ea467c8 SHA-256: 4202503c7103bf3908adef4bd07bd02c08eb013e51a17c9d2d81700069389000
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, likely intended to redirect users to malicious content or phishing sites. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading further payloads. The document body, though heavily obfuscated, contains references to game cheats and mods, suggesting a lure for users seeking such content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-mod-game-hack
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/make-your-own-minecraft-server-free_GM479516143.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-minecraft-maps-pe_GM479516143.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-robux-no-human-verify_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-free-spin-whatsapp-group_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-haktuts_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-robux-instantly_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-free-gift-cards_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-robux-promo-codes-2021_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/unlimited-spin-coin-master-hack_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/cm-daily-spins_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/roblox-free-play-no-download_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-get-800-robux-for-free_GM431946152.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/mcpe-116_GM479516143.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdf
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cbd.bin
f6a8c44872b40a4d1cc88029ba442f6adff9cdd4423abc06d5179a311e1c9abd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CBD 25556 bytes
font_01_sfnt_off00008731.bin
dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8731 4020 bytes
font_02_sfnt_off000094b9.bin
e3dc30cd69473f08b9483bb660e9aeaccc8f6f74c3e4f353697525059d592d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B9 17720 bytes

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