Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08d4a5ae27c934a…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 07:24:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ff28a8b6570a16cd01e79df25be6dd69 SHA-1: 5a8ae31990bc828c2ac3b0e53d25071cffc29930 SHA-256: d08d4a5ae27c934afd5b6a1918480107d0670963af52aabe416389f795f8d828
160 Risk Score

Malware Insights

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

This PDF document contains a lure for free game hacks and Robux, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary IOC is the redirector URL which likely serves as a gateway to further malicious content.

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/free-robux-without-offers-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/fly-hack-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-hack-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/youtube-como-ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-jailbreak-hacks-dll_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/copy-and-paste-free-robux-items_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-free-shirt-templates-download_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-promocode-roblox-thanksgiving_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/rocash-earn-robux-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/black-magic-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-hack-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-online-free-no-download_GM479516143.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_off000032e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E1 23312 bytes
SHA-256: c0925c3290f35da9b82d4e991bcc1e4611eebbd07f6874ca34844d1d59c523a6
font_01_sfnt_off0000675e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675E 19304 bytes
SHA-256: d28279064c80375efd82c55b38a8139998c8ec291e9a82c1a232f0005e70f64e

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