Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc72efd2d9587b76…

MALICIOUS

PDF

41.9 KB Created: 2021-05-14 13:41:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 14d8a3247380f1b1685151e3338a023f SHA-1: 7d89d59e8bf633e185a507e92eee6d411dc49883 SHA-256: cc72efd2d9587b76843a9721c4f1fb9ea819f2248ca7dee5be79b0214b2bb8d3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which appear to be part of a link farm designed for SEO manipulation or to distribute game-related cheats. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs suggests a malicious workflow. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/how-to-get-free-cards-for-coin-master-game-hack
    • http://mainzer-marktplatz.de/images/install-free-game-coin-master_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/free-spins-coin-master-without-completing-offers_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/coin-master-hack-lost-world-2021-com_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/how-many-levels-are-in-coin-master_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/coin-master-free-spins-whatsapp-link_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/free-robux-no-apps_GM431946152.pdf
    • http://mainzer-marktplatz.de/images/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://mainzer-marktplatz.de/images/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/free-spins-on-coin-master-app_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/download-hacked-games-coin-master_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/bux-life-free-robux_GM431946152.pdf
    • http://mainzer-marktplatz.de/images/coin-master-spins_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/easy-robux-hack_GM431946152.pdf
    • http://mainzer-marktplatz.de/images/earn-robux_GM431946152.pdf
    • http://mainzer-marktplatz.de/images/coin-master-hack-cydia_GM406889139.pdf
    • http://mainzer-marktplatz.de/images/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdf
    • http://mainzer-marktplatz.de/images/can-you-actually-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049e8.bin
d63feca84471d777991e81d634e9576b4db42ce346c6acb039e92e8296248ed2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E8 24516 bytes
font_01_sfnt_off0000823c.bin
c3f371278b7fe6873213599d15e2d537c4e536c02b9f7f2e86ee974651b3645e
pdf-font-stream PDF embedded font (sfnt) at offset 0x823C 18048 bytes