Malicious PDF — malware analysis report

Static analysis result for SHA-256 471d0fcbd463190c…

MALICIOUS

PDF

38.3 KB Created: 2021-05-12 01:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: aa6245e0ad05e516ce04c262bfa17dce SHA-1: 74a6c86e87fee78d57753e578f3e3249a05b4cf6 SHA-256: 471d0fcbd463190ce36ecfcc2c93f8c6124b74d8b6168a25346881382eab2641
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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.
  • 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/free-robux-hacker-us-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-ban_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6D 23972 bytes
SHA-256: 4f52aa0e83b68c8611de97f3e01848f530113fa59e10877b0eeb6f6f1e85c9e8
font_01_sfnt_off00008215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8215 3656 bytes
SHA-256: 63a179d8a9645bea05c6d53b1776faf4e4a7281930de6cf484e639846bec2e20

Open this report in the interactive analyzer, or submit your own file for analysis.