Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de85fee9074e66c…

MALICIOUS

PDF

36.4 KB Created: 2021-07-05 20:34:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 03d9adde98a2bec512258b895f145074 SHA-1: 6dd9ba480deeefec63ba64c76c3342bc70eb7692 SHA-256: 3de85fee9074e66cb0f51770feaa0994f95377ba44c8549dffb2749b5374018e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors, disguised as free game hacks or generators. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to redirect users to malicious sites, likely for further exploitation or malware delivery.

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/free-minecraft-java-edition-game-hack In PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-generator-fresh-update-5032021_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/tiktok-free-99_GM835599320.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-roblox-coding_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-camera-roblox-studio_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/roblox-cheat-money-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/html-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/los-mejores-hacks-nuevo-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-hoodies-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-vip-server-roblox-ninja-legends_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-codes-2021-not-used-june_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-on-robux-store_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/daily-free-spin-coin-master-link_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
font_00_sfnt_off000038f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38F4 22752 bytes
SHA-256: bbebd2c0bd854970407a2da9a6b4e18c716042a896ef26ff6fc498bb7e685c42
font_01_sfnt_off00006b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4A 18452 bytes
SHA-256: d83f40a0e6f207785081a15a357f7faef04f5cec5f9f625e4715c9d92afd3c55

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