Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbbd72f9fa1d5a4…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 08:21:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 87106546ec09b627f9834ec2d60323cd SHA-1: bd2b26980348748360109b727bebadc2fd40b4f4 SHA-256: 5bbbd72f9fa1d5a4c6f712d32ac2cf1a53044bc6394f046e1f3025f800b330f4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized links for game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure further supports a malicious intent. The primary goal appears to be directing users to download potentially harmful files disguised as game cheats.

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.online/app/479516143/minecraft-windows-10-hacks-game-hack
    • http://thamelinn.com/userfiles/files/minecraft-wurst-hacked-client_GM479516143.pdf
    • http://thamelinn.com/userfiles/files/minecraft-online-free-no-download_GM479516143.pdf
    • http://thamelinn.com/userfiles/files/moonactive-coin-master-hack_GM406889139.pdf
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-generator-no-verification_GM406889139.pdf
    • http://thamelinn.com/userfiles/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdf
    • http://thamelinn.com/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://thamelinn.com/userfiles/files/roblox-gift-card-online-free_GM431946152.pdf
    • http://thamelinn.com/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • http://thamelinn.com/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://thamelinn.com/userfiles/files/coin-master-download_GM406889139.pdf
    • http://thamelinn.com/userfiles/files/free-spins-coin-master-cheat_GM406889139.pdf
    • http://thamelinn.com/userfiles/files/how-to-make-free-robux_GM431946152.pdf
    • http://thamelinn.com/userfiles/files/coin-master-app-hack_GM406889139.pdf
    • http://thamelinn.com/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • http://thamelinn.com/userfiles/files/free-tiktok-coins_GM835599320.pdf
    • http://thamelinn.com/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://thamelinn.com/userfiles/files/coin-master-cards-for-free_GM406889139.pdf
    • http://thamelinn.com/userfiles/files/robux-hack-free-robux_GM431946152.pdf
    • http://thamelinn.com/userfiles/files/free-robux-games_GM431946152.pdf
    • http://thamelinn.com/userfiles/files/coin-master-level-3_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005161.bin
7e00cee94812a6fd81b4c1ebeb740ac2c1917777a78bbbbdc8606063144a0e1e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5161 24568 bytes
font_01_sfnt_off0000896a.bin
14f86b407040f424958936cb2b2b49b26067a8980bd50a77917f0563cc1bff87
pdf-font-stream PDF embedded font (sfnt) at offset 0x896A 18696 bytes