Malicious PDF — malware analysis report

Static analysis result for SHA-256 374171908ca0830f…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 08:13:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b992329a8cc066269bb7059b9d3ae927 SHA-1: 53c995789074c036aefe86fedfb50c3deec27629 SHA-256: 374171908ca0830fd5ca6ab9824608c7fbe3d6ff1188d07005cbeb4d8f6430d8
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to pages promising free in-game currency or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of such links, and the 'ML_NYX_PDF_MALICIOUS' score is very high. The document body and extracted URLs suggest a scam designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/what-is-the-easiest-way-to-get-free-robux-game-hack PDF link annotation
    • http://sudamericarural.org/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-apocalypse-rising-hack-dll_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-devil_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-time-speed-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_off00003188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3188 22128 bytes
SHA-256: a89731dfb8d351bd7f69be14777d913a05292e51787304550ab9b98c664ab054
font_01_sfnt_off00006294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 19300 bytes
SHA-256: e062bbab0bec343c2e52656680bf2366640e8ff0e23ba9adbabd9058ac08ec2a

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