Malicious PDF — malware analysis report

Static analysis result for SHA-256 4151dc05f93f4a4b…

MALICIOUS

PDF

42.9 KB Created: 2021-05-18 03:14:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c9c512d13df6f1b88d0fc9d395f83f94 SHA-1: dc58bec4bf507d796703ab1ae2540e1c6be650eb SHA-256: 4151dc05f93f4a4bc2b5724c2a02123a0f9297419e3ed4da2d01e460e2f298ae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game-related content. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further exploitation 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/479516143/minecraft-hack-app-game-hack In PDF document text
    • http://jackson-pr.com/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://jackson-pr.com/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://jackson-pr.com/images/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/roblox-download_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://jackson-pr.com/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://jackson-pr.com/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://jackson-pr.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://jackson-pr.com/images/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://jackson-pr.com/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://jackson-pr.com/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://discord.ggIn 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_off00004c9f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C9F 25516 bytes
SHA-256: c789b08c597be889c149492adfb1d8137dc4601fdc18fcddb5096e58e0a0bc5c
font_01_sfnt_off000086ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CE 17912 bytes
SHA-256: 034e04b5cafc108ff4258a9a8c33ed7a0e20a1bf60bea28de924bbbe05b546ea

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