Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e90ee11221e73e…

MALICIOUS

PDF

43.1 KB Created: 2021-05-19 20:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c81ed06f290bb520bdb1dd1e9eb751db SHA-1: a856403e016e43a141f86c5a0f4dce5fe8440afe SHA-256: 54e90ee11221e73eacaac561db97373d673057a6a399c303172dd1f7aac90186
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, forming a link farm, with a primary URL pointing to a "free Robux" lure. The heuristic PDF_SEO_LINK_FARM indicates a large number of related scam PDFs were generated. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for financial gain or to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/get-me-free-robux-game-hack
    • http://www.gadanie.lv/images/free-robux-no-downloading-apps_GM431946152.pdf
    • http://www.gadanie.lv/images/windows-10-minecraft-hacks_GM479516143.pdf
    • http://www.gadanie.lv/images/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://www.gadanie.lv/images/master-game_GM406889139.pdf
    • http://www.gadanie.lv/images/pubg-uc-kaise-khariden_GM1330123889.pdf
    • http://www.gadanie.lv/images/minecraft-net-download-free_GM479516143.pdf
    • http://www.gadanie.lv/images/how-to-hack-coin-master-apkmody_GM406889139.pdf
    • http://www.gadanie.lv/images/free-spins-and-coins-coin-master_GM406889139.pdf
    • http://www.gadanie.lv/images/coin-master-free-spin-download_GM406889139.pdf
    • http://www.gadanie.lv/images/hack-coin-master-free-spins_GM406889139.pdf
    • http://www.gadanie.lv/images/coin-master-free-cards-link_GM406889139.pdf
    • http://www.gadanie.lv/images/how-to-get-2021-robux-for-free_GM431946152.pdf
    • http://www.gadanie.lv/images/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://www.gadanie.lv/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://www.gadanie.lv/images/orewards-com-free-robux_GM431946152.pdf
    • http://www.gadanie.lv/images/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • http://www.gadanie.lv/images/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://www.gadanie.lv/images/coin-master-online-hack_GM406889139.pdf
    • http://www.gadanie.lv/images/how-to-get-free-robux-easy_GM431946152.pdf
    • http://www.gadanie.lv/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000490d.bin
39de691eadd15566e0aebc0f7951a585f23290b952cced615ae9f9854c524d75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x490D 26180 bytes
font_01_sfnt_off00008640.bin
e3f176f8735a7a9c211288ec5f3dfc0a25536bb398bd4870e4b297ba4f960079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8640 18312 bytes

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