Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2978d137712fc3…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 06:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0b5547fea0fc29ad48771599df175800 SHA-1: b359b845c46e9af077b7cf63e9a4bc596c0dbe34 SHA-256: 7c2978d137712fc3f1f4c595f49efbe283ebc6e45216256f712a3b1d3bc3ab1a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The primary URL and many others point to game hacks and cheats, indicating a lure for potentially unwanted or malicious downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" heuristic further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/bloxburg-free-robux-game-hack
    • http://www.malonmalon.com.ar/images/free-coin-master-spins-daily_GM406889139.pdf
    • http://www.malonmalon.com.ar/images/roblox-no-download-hack_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/free-robux-no-verification-at-all_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/cheat-roblox-kick-player_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/coin-master-hack-app-android-download_GM406889139.pdf
    • http://www.malonmalon.com.ar/images/minecraft-java-edition-free-trial_GM479516143.pdf
    • http://www.malonmalon.com.ar/images/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • http://www.malonmalon.com.ar/images/free-robux-images_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/free-robux-codes-generator_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://www.malonmalon.com.ar/images/coin-master-fb-free-spins-link_GM406889139.pdf
    • http://www.malonmalon.com.ar/images/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/free-robux-generator-2021_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/how-to-hack-a-minecraft-server_GM479516143.pdf
    • http://www.malonmalon.com.ar/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/coin-master-hack-app-2021_GM406889139.pdf
    • http://www.malonmalon.com.ar/images/i-cant-get-free-spins-coin-master_GM406889139.pdf
    • http://www.malonmalon.com.ar/images/how-to-win-free-robux_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/best-free-robux-sites_GM431946152.pdf
    • http://www.malonmalon.com.ar/images/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005032.bin
0653f6b3eb50c8dcb2f38987e2e4b5bd19ade221fd76db98cb0113373372b528
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5032 25476 bytes
font_01_sfnt_off00008b9b.bin
386d585df658424a0ee05a59d135d562ce707678bcc729985ceb59fa3fe1bd57
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9B 18376 bytes