Malicious PDF — malware analysis report

Static analysis result for SHA-256 1058387c03f7570c…

MALICIOUS

PDF

42.2 KB Created: 2021-05-19 09:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1b894a7f77b1f234aa4f2595ede9cc2a SHA-1: 893e53223868cfccbe795d5bd0278c1f6115baee SHA-256: 1058387c03f7570c7f31685878b42ac99311e1e8e8ca6fbb87700641352c2767
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to attract users searching for game hacks. The presence of a direct download URL and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/479516143/free-minecraft-for-kids-game-hack PDF link annotation
    • http://windhorsetrek.com/userfiles/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/can-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-spin-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
stream_003_off00004ca3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA3 24284 bytes
SHA-256: 3083cf17e87f752b77d76c3a24b402f9abd09547147dae9293da01864cdea88b
font_01_sfnt_off000083b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B1 17884 bytes
SHA-256: db9aaf58ea00c011e8bfb0bda6e5c72a5ee10e2312103ce2cdee42fc8763a3fb

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