Malicious PDF — malware analysis report

Static analysis result for SHA-256 684404704465b7c4…

MALICIOUS

PDF

45.8 KB Created: 2021-05-12 06:37:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3967144e74517d11d10b3487453aa816 SHA-1: 779b39c98cff8bf3aee167112c6929bfbd954770 SHA-256: 684404704465b7c4632602ee35c7151658fd996fb67abb30e67854e46d80bf0c
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/blox-fish-free-robux-game-hack PDF link annotation
    • http://greasley.website/images/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/oginject-co_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nrzroblox.comIn PDF document text
    • https://www.bandicam.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF6 25156 bytes
SHA-256: bb903c9224ec96f2ea6fcae71e2918fe4f446787fc4e96e26d4adea34bc0a64a
font_01_sfnt_off000083d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D6 3656 bytes
SHA-256: 63a179d8a9645bea05c6d53b1776faf4e4a7281930de6cf484e639846bec2e20
font_02_sfnt_off00009090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9090 18376 bytes
SHA-256: 833bfe47d36e77ffff594e1188eeee77c72f4d78f65cd820fb361f10e8c51563

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