Malicious PDF — malware analysis report

Static analysis result for SHA-256 66bc9de6ff99b7ea…

MALICIOUS

PDF

34.7 KB Created: 2021-07-02 08:47:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 40b4a3c35c3dbd46b54774ae8480a791 SHA-1: f0193e4666c1b751d7be435fab03263b35a1211a SHA-256: 66bc9de6ff99b7ea4838050712becdad87a0cfadcfdb694f8673e1cb5e44c1a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" and "free generators" for popular games. The document body and embedded URLs strongly suggest a lure for users seeking cheats or in-game currency, leading them to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-jailbraik-hack-game-hack In PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/roblox-meep-city-how-to-get-free-plus_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/roblox-sad-cheat-story_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-do-i-get-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-robux-gift-card-codes-800-robux_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-get-free-stuff-on-roblox-with-codes_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/roblox-robux-hack-deutsch-2021_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-roblox-generator-for-roblox_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
stream_002_off00003005.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3005 22672 bytes
SHA-256: 6c0dc281a6be269532ebc09250b9b4da45a7f2e4c7957f207510ec382198b250
font_01_sfnt_off000062d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D9 18944 bytes
SHA-256: 831cd5ed2558e6c72746f39271e9fbef3014fdf166bde53bf84993515f8e1183

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