Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8a9db0e3c974e9…

MALICIOUS

PDF

34.6 KB Created: 2021-06-21 16:30:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 93b040a3afd6bad4b08e699183253ab4 SHA-1: a274697c8aa743114a28975539589a623e54c141 SHA-256: dd8a9db0e3c974e91ef3ce9065e67007b62638dbe674e94a142d3ef9be10e283
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 items for popular games, acting as a lure for users to click on malicious links. The heuristic findings indicate a link farm designed to host such lures, and the ML classifier strongly suggests malicious intent. While no scripts were directly extracted, the structure and content point towards a phishing or scam attempt.

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/how-to-get-free-dominus-roblox-game-hack
    • http://schrichte.de/images/free-robux-codes-generator_GM431946152.pdf
    • http://schrichte.de/images/coin-master-hack-no-root_GM406889139.pdf
    • http://schrichte.de/images/free-robux-no-verification-needed_GM431946152.pdf
    • http://schrichte.de/images/free-robux-reddit_GM431946152.pdf
    • http://schrichte.de/images/coin-master-free-spin-app-2021_GM406889139.pdf
    • http://schrichte.de/images/facebook-coin-master_GM406889139.pdf
    • http://schrichte.de/images/free-spin-in-coin-master_GM406889139.pdf
    • http://schrichte.de/images/free-robux-generator-google-chrome-plugin_GM431946152.pdf
    • http://schrichte.de/images/escape-room-by-devultra-cheats-roblox-forest_GM431946152.pdf
    • http://schrichte.de/images/youtube-how-to-hack-a-roblox-account_GM431946152.pdf
    • http://schrichte.de/images/cheat-engine-roblox-hacks-218_GM431946152.pdf
    • http://schrichte.de/images/free-minecraft-server_GM479516143.pdf
    • http://schrichte.de/images/coin-master-free-spin-no-offers_GM406889139.pdf
    • http://schrichte.de/images/how-to-scam-for-free-robux_GM431946152.pdf
    • http://schrichte.de/images/free-coin-spin-coin-master_GM406889139.pdf
    • http://schrichte.de/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://schrichte.de/images/free-minecraft-domain_GM479516143.pdf
    • http://schrichte.de/images/top-10-roblox-hacks-rolbox-fandom_GM431946152.pdf
    • http://schrichte.de/images/coin-master-game_GM406889139.pdf
    • http://schrichte.de/images/haktuts-coin-master-free-spin-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e6e.bin
38ac463b867280ae3e4e521c074ecfb0bdee01152038348070feb3bd5c96735f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E6E 22556 bytes
font_01_sfnt_off000060ba.bin
4d1659c431e0727ede48d0663864cc07e6f453a6a6fee0da00be914aa0ab6345
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BA 19608 bytes