Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1c42bc871411e1…

MALICIOUS

PDF

34.6 KB Created: 2021-07-01 22:31:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7f209d823f6d7628b39b9bb98e82ead1 SHA-1: 762d9b3a4efa4a1b11749a51dc50282015135214 SHA-256: 7d1c42bc871411e173e2f917400bb43817eb4617309ebb236afb1ba71b1047ec
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly mentions game hacks and cheats, such as 'how-to-shut-down-roblox-server-with-cheat-engine'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the overall pattern suggests a lure to malicious websites.

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-shut-down-roblox-server-with-cheat-engine-game-hack
    • http://digilib.stie-yppi.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/robux-hack-script-for-free-robux_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-robux-pastebin_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/flee-the-facility-roblox-hack-exploit-gui_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/www-roblox-cheat-us_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-robux-without-having-the-vera-cage_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox36com-free-robux_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-cheat-in-roblox-2021_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-hoodie-free_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/minecraft-pocket-edition-free-apk_GM479516143.pdf
    • http://digilib.stie-yppi.ac.id/repository/minecraft-modded-client_GM479516143.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-coins-in-roblox-murder-mystery-2_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/robux-hack-2021_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-robux-place_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003005.bin
da2ab348af4392b2f1bef49604d2e71eb245bc730fd06583939fb5d4b332bd6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3005 21844 bytes
font_01_sfnt_off00006040.bin
ecd47db15db5143782bef4e9f00ddb54b255b633b38173a0a79523c66fe7cc74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6040 19660 bytes

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