Malicious PDF — malware analysis report

Static analysis result for SHA-256 3575d81c9a65d919…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 21:50:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 56bb1327fcab616edd8be3ccdd11a899 SHA-1: ad406e80a84bcbf5359abeae27ac4bfe669b8039 SHA-256: 3575d81c9a65d9192b560cd3820a8e6345b5dbf17210b239b995c6dd9951f03d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary link, http://netcdn.co/app/431946152/roblox-bloxburg-free-to-play-game-hack, is identified as a malicious redirector. The document body also contains a call-to-action phrase, suggesting a user interaction is intended to trigger the malicious redirection or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-bloxburg-free-to-play-game-hack In PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/secret-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/robux-online_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/get-free-group-roblox_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/military-base-roblox-free-model_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-avatar-girl_GM431946152.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_off00003004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3004 21668 bytes
SHA-256: 8d875bf457a137f123189305bc59d3a5cd84fe6a0d67b747779bbb87684e612f
font_01_sfnt_off00006006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6006 19124 bytes
SHA-256: a288b996aec7a31e742bfb7d6c0d30724ac2b4546d944bf6cf7f625cedcb0fa3

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