Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d11e39fb5b0c9de…

MALICIOUS

PDF

42.9 KB Created: 2021-05-14 16:18:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2feff552e8cbf10f53b17416735ee534 SHA-1: 7979e1fa3eeff53c639468d603fb9cdc0ecfb145 SHA-256: 4d11e39fb5b0c9ded5f9f7d979df5aceea3f1c7cbf02d3b6659c9dbb0be76861
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. The embedded links point to websites offering game cheats and free currency, which are common lures for malware distribution or credential harvesting.

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/431946152/how-to-gift-robux-on-mobile-game-hack
    • http://artindex.pro/images/free-spin-link-in-coin-master-game_GM406889139.pdf
    • http://artindex.pro/images/how-do-you-hack-roblox_GM431946152.pdf
    • http://artindex.pro/images/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://artindex.pro/images/free-roblox-groups-with-funds_GM431946152.pdf
    • http://artindex.pro/images/can-i-play-roblox-for-free_GM431946152.pdf
    • http://artindex.pro/images/teach-me-to-hack_GM431946152.pdf
    • http://artindex.pro/images/how-to-hack-roblox-games_GM431946152.pdf
    • http://artindex.pro/images/coin-master-unlimited-spins-apk-free-download_GM406889139.pdf
    • http://artindex.pro/images/free-spins-coin-master-2021_GM406889139.pdf
    • http://artindex.pro/images/how-you-get-free-robux_GM431946152.pdf
    • http://artindex.pro/images/coin-master-free-spins-no-generator_GM406889139.pdf
    • http://artindex.pro/images/is-there-a-free-version-of-minecraft_GM479516143.pdf
    • http://artindex.pro/images/get-free-robux-no-human-verification_GM431946152.pdf
    • http://artindex.pro/images/rblx-gg-free-robux_GM431946152.pdf
    • http://artindex.pro/images/minecraft-free-play-now_GM479516143.pdf
    • http://artindex.pro/images/coin-master-free-spin-and-coin_GM406889139.pdf
    • http://artindex.pro/images/tiktok-minecraft-hacks_GM479516143.pdf
    • http://artindex.pro/images/robux-hack-2021_GM431946152.pdf
    • http://artindex.pro/images/free-coin-master-account_GM406889139.pdf
    • http://artindex.pro/images/huskybuckscom-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004966.bin
7eb5b45d6121f624c265fabe1a9eb20803320217a73f6624a43298d8fa8fd9f0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4966 25560 bytes
font_01_sfnt_off000084d2.bin
4e4801ff192b8e14fd7533e10dce0a67112ed0a3683ce7dd9491cafead6d393b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D2 18508 bytes

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