Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ec7e162df827f0…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 12:39:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7b6c1ca0442c0f80ac28d5504979b14e SHA-1: 6c44ded96a4aec8f5798e08b65670c519e6794b5 SHA-256: 64ec7e162df827f0414643a92ce6bdddafe8063bfada288cbdc3eda1618f0837
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-get-1-million-robux-for-free-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in credential harvesting.

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/431946152/how-to-get-1-million-robux-for-free-2021-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan//repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-be-builders-club-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/youtubers-that-give-codes-for-robux-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-2021-inspect-element_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/was-ist-robux-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-how-to-use-nebula-exploit-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/ajc-tech-free-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/apps-for-free-robux_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
font_00_sfnt_off00003119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3119 22544 bytes
SHA-256: d16ae288ee7850d27348b3fe0cad0349af5c0636c69b708b7ca6a97db2aabac8
font_01_sfnt_off0000638b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638B 19776 bytes
SHA-256: 3729c149e68d86db1c65f615c1f40252ecd2b73d2d971cd5d72cafcdeb2ff644

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