Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4e11b69f3c253c…

MALICIOUS

PDF

44.5 KB Created: 2021-06-08 03:09:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 04d0e0b3b21c1423e04903bd3b7b750f SHA-1: 7dfd1d0f836d970809b9bdefe7f359c216e6921b SHA-256: db4e11b69f3c253cb58b03f95645b8a8bb01a3322cd8384b6c85270f91aa3a5a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is https://netcdn.tw/app/431946152/free-unlimited-robux-ad-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a social engineering tactic to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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/free-unlimited-robux-ad-game-hack In PDF document text
    • https://lita-lb.org/images/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/pastebin-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/roblox-hacked-client-2021_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/kachifpro_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/minecraft-free_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/flip-master-free-coins_GM406889139.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_004_off00004d43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D43 26488 bytes
SHA-256: 18478ddff52c3601917ab07f31563cc2b69b96efe2ed164d31c715d667fa9bb1
font_01_sfnt_off000089aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AA 18932 bytes
SHA-256: 539aa2f9574a36d9ffee2315d5cc812e68617bff37b6e0cae37cd7ff3ca80552

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