Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4800df266e1e2ab…

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 11:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0941473230862f251a4464d2ce9afaa9 SHA-1: e60b89c73533dad24890eeeb6ba4ec887c435e59 SHA-256: f4800df266e1e2ab7a9263f475c326e900f2df661647dd771cb32955bc3bae6c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The document body and heuristics indicate a lure for game hacks, directing users to download content from suspicious URLs. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious download lure.

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/coin-master-hack-8-ball-pool-game-hack PDF link annotation
    • http://apd-ukraine.de/images/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://apd-ukraine.de/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-free-master_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://apd-ukraine.de/images/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apd-ukraine.de/images/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://apd-ukraine.de/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004789.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4789 25232 bytes
SHA-256: a32c202a646320629d5a9b6ba939292d934528798ba5512974bcf8be0c999f1a
font_01_sfnt_off000080eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80EB 18372 bytes
SHA-256: a36c8568268bd3843c99b13e037ad7d172b032abb8e2fd77dcfbea09e612cebb