Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee3f0433152b34a…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 06:15:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b146639e9de2735e25e58bcb8924e061 SHA-1: 2a0ee27816ea4b4682a0f4a18a6fd14fdbf48dfe SHA-256: dee3f0433152b34abab156cad3b841dd775ca1e727a0f93d395a29187e18c874
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users interested in game hacks like Roblox. The embedded URL, https://netcdn.tw/app/431946152/roblox-hack-fliight-game-hack, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to game hacks and the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-hack-fliight-game-hack In PDF document text
    • https://cleansui.com.tw/image/data/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-bonus_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/pubg-uc-lebanon_GM1330123889.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/is-nexusus-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-human-verification_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_off000050c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C5 24788 bytes
SHA-256: 6ff90a03b09d628601ca82b6a054c6900c89cb51d022140acf5a243f376b0473
font_01_sfnt_off00008986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8986 19024 bytes
SHA-256: 0d8c936fbc47e4aa909f9b1c3ae27ff22053e3f69bc065b676b069e869102267

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