Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8793223d721e0e0…

MALICIOUS

PDF

46.1 KB Created: 2021-06-08 14:32:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5b083464b45b5e117f9f309e89f0d9db SHA-1: 781c4bab6d182f826b67d1eaf2e0f3f06ad1b0a5 SHA-256: b8793223d721e0e07811148875fb100b832e7596dc928b269be532d8525653c0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes 'hacks' and 'generators' for popular games, aiming to trick users into downloading further content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are PDFs themselves, suggesting a link farm designed to drive traffic to malicious or scam sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/robux-hack-generator-no-survery-no-human-verification-game-hack
    • http://doganov.be/images/mcpe-master-coins-hack_GM406889139.pdf
    • http://doganov.be/images/www-cheatsk-com-coin-master-hack_GM406889139.pdf
    • http://doganov.be/images/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • http://doganov.be/images/free-tiktok-fans-no-verification_GM835599320.pdf
    • http://doganov.be/images/free-minecraft-games-for-kids_GM479516143.pdf
    • http://doganov.be/images/free-spins-coin-master-app_GM406889139.pdf
    • http://doganov.be/images/coin-master-hack-with-lucky-patcher_GM406889139.pdf
    • http://doganov.be/images/best-free-minecraft-server-hosting_GM479516143.pdf
    • http://doganov.be/images/infinity-jump-roblox-free_GM431946152.pdf
    • http://doganov.be/images/how-to-hack-coin-master-game-ios_GM406889139.pdf
    • http://doganov.be/images/robux-free-com_GM431946152.pdf
    • http://doganov.be/images/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://doganov.be/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdf
    • http://doganov.be/images/how-to-hack-people-in-roblox_GM431946152.pdf
    • http://doganov.be/images/free-robux-app_GM431946152.pdf
    • http://doganov.be/images/www-bandicam-com-free-robux_GM431946152.pdf
    • http://doganov.be/images/oprewards-points-generator_GM431946152.pdf
    • http://doganov.be/images/coin-master-free-gifts_GM406889139.pdf
    • http://doganov.be/images/asshurt-roblox-free-download_GM431946152.pdf
    • http://doganov.be/images/smart-lodhi-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005406.bin
232485faa06f8145857db8966a3df51e96c9c817b2130807baaaa7d54b113de5
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5406 26448 bytes
font_01_sfnt_off00008ed0.bin
4a524a1600ca3438f681cf8176145318e1826fbe10dcdfcd23512090c51bafe8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED0 19160 bytes