Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92a912737f8b081…

MALICIOUS

PDF

40.7 KB Created: 2021-05-19 17:29:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 42e10e5bb6cfc2ed8907d20472a208a0 SHA-1: fa70e6181fe98b869cd5deadb81e9ad3c064028b SHA-256: e92a912737f8b081410ad7c1eadb489617acb4fdd2e985c1ca03cdb73b26f188
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, forming a link farm. The document body, though partially garbled, contains references to 'free spin online tool' and game-related terms, suggesting a lure for users seeking cheats or hacks. The presence of a visual download button heuristic further supports the deceptive nature of the document, aiming to trick users into clicking malicious links.

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/free-spin-online-tool-coin-master-game-hack
    • http://schottlandfieber.de/images/minecraft-for-free-on-phone_GM479516143.pdf
    • http://schottlandfieber.de/images/where-to-get-free-robux_GM431946152.pdf
    • http://schottlandfieber.de/images/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://schottlandfieber.de/images/free-minecraft-skins-ps4_GM479516143.pdf
    • http://schottlandfieber.de/images/free-robux-gift-card_GM431946152.pdf
    • http://schottlandfieber.de/images/coin-master-claim-free-spins_GM406889139.pdf
    • http://schottlandfieber.de/images/coin-master-admin-free-spins_GM406889139.pdf
    • http://schottlandfieber.de/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://schottlandfieber.de/images/roblox-avatar-editor-free_GM431946152.pdf
    • http://schottlandfieber.de/images/roblox-hacks-com_GM431946152.pdf
    • http://schottlandfieber.de/images/free-coins-and-spins_GM406889139.pdf
    • http://schottlandfieber.de/images/como-hack-coin-master_GM406889139.pdf
    • http://schottlandfieber.de/images/get-free-spins-for-coin-master_GM406889139.pdf
    • http://schottlandfieber.de/images/coin-master-hacks-for-android_GM406889139.pdf
    • http://schottlandfieber.de/images/daily-coin-master-free-spins_GM406889139.pdf
    • http://schottlandfieber.de/images/coin-master-free-spin-redeem-code_GM406889139.pdf
    • http://schottlandfieber.de/images/minecraft-windows-10-free-with-java_GM479516143.pdf
    • http://schottlandfieber.de/images/free-spins-coin-master-october-13-2021_GM406889139.pdf
    • http://schottlandfieber.de/images/games-that-can-be-hacked_GM431946152.pdf
    • http://schottlandfieber.de/images/minecraft-client-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000474f.bin
249d553468a4b92d90d2f491efda9af95eb31ee61b6bcf5465df8704ebfe207a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x474F 23776 bytes
font_01_sfnt_off00007d8c.bin
ccd8a57ddc21ec57658e97dd2298d9591a9512a4c36f8c476c3f4a0a1231a43c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 17960 bytes