Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6ed4d3ba943afd…

MALICIOUS

PDF

47.0 KB Created: 2021-05-13 09:03:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4147c9535c730c32e1950aeb269bd8dd SHA-1: 9a6f5f6778871f18d60b1633b491a800f9bfab5c SHA-256: 7c6ed4d3ba943afdc40c17150e41997f3c8d3fad1c2ac6648668ad14f3b177ad
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways for game-related cheats and hacks. The presence of a 'download button' lure and a high ML classifier score further indicate malicious intent. The primary goal appears to be directing users to download potentially unwanted or malicious applications from the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/free-spin-coin-master-app-download-game-hack
    • http://bernd-voehringer.de/images/how-can-you-get-free-robux_GM431946152.pdf
    • http://bernd-voehringer.de/images/coin-master-free-spins-link-may-2021_GM406889139.pdf
    • http://bernd-voehringer.de/images/how-to-get-free-robux-app_GM431946152.pdf
    • http://bernd-voehringer.de/images/real-free-robux-codes_GM431946152.pdf
    • http://bernd-voehringer.de/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://bernd-voehringer.de/images/100-free-spins-coin-master-link_GM406889139.pdf
    • http://bernd-voehringer.de/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdf
    • http://bernd-voehringer.de/images/robux-hack-generator_GM431946152.pdf
    • http://bernd-voehringer.de/images/coin-master-pc-game-free-download_GM406889139.pdf
    • http://bernd-voehringer.de/images/coin-master-free-spins-link-download-today_GM406889139.pdf
    • http://bernd-voehringer.de/images/coin-master-hack-tool-for-pc_GM406889139.pdf
    • http://bernd-voehringer.de/images/roblox-free-robux-website_GM431946152.pdf
    • http://bernd-voehringer.de/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdf
    • http://bernd-voehringer.de/images/hack-coin-master-2021_GM406889139.pdf
    • http://bernd-voehringer.de/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://bernd-voehringer.de/images/my-minecraft-account-was-hacked_GM479516143.pdf
    • http://bernd-voehringer.de/images/roblox-hacks-com_GM431946152.pdf
    • http://bernd-voehringer.de/images/minecraft-com-free_GM479516143.pdf
    • http://bernd-voehringer.de/images/coin-master-daily-spins-and-coins_GM406889139.pdf
    • http://bernd-voehringer.de/images/coin-master-links-that-don-t-expire_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004dc1.bin
f09c7b30d4a20d56ac2d55b2bd2732d3aae8fe48a01e7580408b5fe114232ea4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DC1 26976 bytes
font_01_sfnt_off00008afb.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 2840 bytes
font_02_sfnt_off000094ad.bin
5d479065cf79f2f9a0a9ab9e4084ffa9868228cef0b1d352b42e78b889d944c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x94AD 18464 bytes