Malicious PDF — malware analysis report

Static analysis result for SHA-256 5943b7f029d08526…

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 14:07:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5745e3699a911391c89de145f96dda0c SHA-1: 874334bdf8d0cf5a6d5d87f7bce1b55474311e88 SHA-256: 5943b7f029d08526a04f33a23d168bfd68a6a4f488d1049feeb0ea398404d560
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free in-game currency. The ML classifier and specific PDF heuristics strongly indicate malicious intent. The primary lure is a link to 'http://netcdn.co/app/431946152/how-to-get-free-wings-in-roblox-2021-game-hack', which is associated with known malicious redirectors.

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/how-to-get-free-wings-in-roblox-2021-game-hack In PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/easy-points-gg_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/roblox-thanos-gauntlet-for-free_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/hack-de-roblox-bee-simulator_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/cheats-on-roblox-game_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/roblox-robux-hack-online-genorator-tool_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://comunidaddeatencion.argentina.gob.ar/ckfinder/userfiles/files/free-bedrock-minecraft_GM479516143.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_off000031d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D0 22492 bytes
SHA-256: b30b15d361795fdbc18b1f5b20045611df9fc53f5cf86bc4467e434085cfabd5
font_01_sfnt_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 19636 bytes
SHA-256: 2544e050481e1bbb19334a92d891fbcf8689b97560072ffc3e6caa82d6c594b4

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