Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb24e0fd878ef3bf…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 06:05:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d7e12e2c94dbb5e6b0810e6f5ebd0764 SHA-1: c8676ca3b6557d3f7e5e0b58cb1381673bbc703c SHA-256: eb24e0fd878ef3bf2289c554dcb328aeb74a7631a780e85171e1ed63a34fc981
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 0.9980

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 http://netcdn.co/app/431946152/how-to-get-robux-free-sin-pastebin-2021-game-hack PDF link annotation
    • http://sudamericarural.org/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-tiktok-followers-and-likes-no-human-verification_GM835599320.pdfIn PDF document text
    • http://sudamericarural.org/images/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/galactic-adidas-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-rebirth-codes-for-pet-simulator-2-on-roblox_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • http://sudamericarural.org/images/redeem-your-free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-for-offers_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-free-spins-link-2021-hack_GM406889139.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
font_00_sfnt_off00003323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3323 21716 bytes
SHA-256: ad77b005ffc49de562c4a0dec0760a7d6cf494383bb0fc8cd9ea8ea617b19e67
font_01_sfnt_off000062e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E2 19476 bytes
SHA-256: 27aa3755f2b7ad49c024fcd6105398cc6c238a5ebfb72382ed952bebceafeb70

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