Malicious PDF — malware analysis report

Static analysis result for SHA-256 666f02a7951a44da…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 21:51:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a4ab18d6c2c5a330806d1c1d9cfd075e SHA-1: c65a9b7c7259860df68eafcddc795de21b5bec89 SHA-256: 666f02a7951a44da51bf5eaf5554034e0f453a8ce2f7dd2ca02a5163eef0fb74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, disguised as a lure for free game currency. The ML classifier also flagged this document as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-things-on-roblox-game-hack In PDF document text
    • http://jdleducation.com/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/moon-active_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/free-robux-ad_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_003_off00004835.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4835 25168 bytes
SHA-256: d38701762fef61a648e07e09eef373a0f5446c0611538dcc8b53170c457aa8bb
font_01_sfnt_off00008212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8212 18524 bytes
SHA-256: affed9fa13778d5aa7ca231345c2b6484ae049011ad5c77e497fdf115074fdee

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