Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0b404d3b3015ec…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 08:52:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dddd3c1460340b39d4a37d70308e5046 SHA-1: b7acdb25d7160421f6c5e5f12b47c80f560b1a7c SHA-256: 1c0b404d3b3015ec0d2b1bd25ff59ace7d88d61947f262a72b567e82e4bdf89e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure. The lure appears to be related to 'game hacks' or 'free generators', a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further exploitation or phishing.

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.online/app/479516143/minecraft-games-to-play-for-free-game-hack In PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-tiktok-views-trial_GM835599320.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-free-printables_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-roblox-glasses_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_004_off000050b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B5 23952 bytes
SHA-256: df07db4d92372a0b14c2240c290492e2f4c2c79335e248e2e6ed4b29f36148c1
font_01_sfnt_off0000868b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868B 18380 bytes
SHA-256: e4e6021f190597b5ba2cc648d82e873dd3d7a425745f666e69b81b8efe23a832

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