Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3084279d3e024f6…

MALICIOUS

PDF

47.8 KB Created: 2021-06-11 09:37:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5fcffb8d3e37b5b3a6817df9204e987a SHA-1: f7526d3b4491f0d408b971b41db12cef6cb027ee SHA-256: d3084279d3e024f64c466450cae7891ed9aa56efadd818c010d53ebfc7478c2d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other potentially malicious PDF files, disguised as game hacks or generators. The ML classifier also flagged this PDF as malicious. The document body, though partially garbled, contains references to these lures and embedded URLs, suggesting an attempt to trick users into navigating to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/how-to-ban-people-on-roblox-hack-script-game-hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-hat-pastebin_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/real-free-stuff-roblox_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/robux_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021-pc_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_off000056a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A9 28172 bytes
SHA-256: b29bfbde6a0e16242e4f835b46871bc948e3c72100175bfc488810a2c5f30513
font_01_sfnt_off000096b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B8 18900 bytes
SHA-256: 59d5bb76ab15ddbf31395aa3aee7f88ca566b0f195e9d60fe9da39d6fcdbb194

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