Malicious PDF — malware analysis report

Static analysis result for SHA-256 70433278cd8c6ffd…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 13:32:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b523f4661c6a3e1fadf5f05a0e540afe SHA-1: 3af13e4ff336b03acf8546bf1ccf90e7b7b479c6 SHA-256: 70433278cd8c6ffdfc298378a22ea1fe8db263932169235c8594c59802846903
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector for game hacks. The document body, though partially corrupted, contains text related to 'Minecraft Online Free Download' and a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for initial access or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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-online-free-download-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/login-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-executor-free_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_off00004fd7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD7 29064 bytes
SHA-256: 6c9a96f263f8ace9c941ab74e022f164376f8f8a6f26813a1eeb399d39c820cb
font_01_sfnt_off00009141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9141 18292 bytes
SHA-256: a2a63f8c18687518d260bdaa10b8e62a526b9456f69b3d2706eff3b892369b89

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