Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4aa169664523064…

MALICIOUS

PDF

33.3 KB Created: 2021-07-08 19:11:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 179be35961b6b66eeda8f12894f68b9c SHA-1: 311798180f48cc993c85382858b32f6d097b3d78 SHA-256: b4aa16966452306495b1d6853d62cdd1d449c85ebdb834e49bc0a329b30965f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and hosts further malicious PDFs, masquerading as game hacks and downloads. The document body and heuristics indicate a lure for users interested in games like Minecraft and Roblox, directing them to potentially malicious content. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-free-download-windows-game-hack In PDF document text
    • http://educhina.mn/editor/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-how-to-open-cheat-engine_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-cheat-spinbot_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-free-png_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-cheating-story_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 21548 bytes
SHA-256: 7244bfef3e73a0071023e965212110b19603b579d5761508f2605f7bd3a81b14
font_01_sfnt_off00005dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFA 18776 bytes
SHA-256: 1816d41857fafb62710145750044d0772271d156c0c542d24f261faa84011891

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