Malicious PDF — malware analysis report

Static analysis result for SHA-256 526adeff6bf2273e…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 18:49:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3fc016cc6aec72fec2d7416fa8770e2c SHA-1: 5f64425a6f10dd4d759573c29b02674e8a16b5c8 SHA-256: 526adeff6bf2273e8cdebcfb1212d349cb274bd636d42cce60998920a2683b7b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and sites offering game hacks and cheats, indicating a lure for users to download potentially malicious content or visit phishing pages. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of known malicious infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful sites.

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.tw/app/406889139/mcpe-master-hack-unlimited-coins-game-hack In PDF document text
    • https://www.studio-dentistico-fiume.com/files/cheat-codes-for-roblox-mad-city_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-hacker-group_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-free-body-block_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-jump-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/hack-para-robux-generator_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/minecraft-free_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-roblox-cards-youtube-live_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/jailbreak-robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-roblox-zombie-games_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/dragon-ball-x-roblox-hack_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-decal-id-free-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-catalog-clothing-roblox-2021_GM431946152.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_off00002f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F97 23060 bytes
SHA-256: 3075155501198c0a8adbd7d64edeaf7346994c6a3f46e2bfdb529a5382d139df
font_01_sfnt_off0000637a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637A 18876 bytes
SHA-256: 89932f8f13001460a6ffade74f2ab8dc0afa327f081132bd5821be57dc25f5e8

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