Malicious PDF — malware analysis report

Static analysis result for SHA-256 6becfc83aaee5675…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 16:20:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 47a5bd2f9581c366721d6118afd78fef SHA-1: bb317e54b4d40e60107b3b0961ed0847fece9f87 SHA-256: 6becfc83aaee5675361467a6b2c4eab9de3a0d96fa8cc3c4a5cc441ebcce2b7d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, masquerading as a 'free Robux codes generator'. The document body and embedded links suggest a lure to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/431946152/free-robux-codes-generator-game-hack In PDF document text
    • https://europe-upkl.eu/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://europe-upkl.eu/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://europe-upkl.eu/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/free-robux-games_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://europe-upkl.eu/images/how-to-get-followers-on-tiktok-for-free_GM835599320.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_off00002dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCC 21664 bytes
SHA-256: 2ad53d2826f3586d0fd5b2bbc011cef0e59129b7b2f7fcfacc9ecc7a784a59ee
font_01_sfnt_off00005d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6B 18704 bytes
SHA-256: 7cedffd4078b81daa363670fa887c3ed75a5be4e37f91b6b74bdf33c285228bf

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