Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b42673a6becb37…

MALICIOUS

PDF

33.8 KB Created: 2021-06-26 17:29:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 33c94155f20f7822cc55386e3c78159c SHA-1: 0d857dbfeaa89c44be16011ccfbe8768e898edd3 SHA-256: 53b42673a6becb374752522093d2faaba8d217d631601bc11c7fb78be470ca0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites offering game hacks and in-game currency, such as 'cheats-to-get-cars-in-car-crashers-2-roblox-game-hack'. These links are identified as malicious redirectors, indicating a phishing or scam attempt. The document body explicitly contains a call to action, 'CLICK HERE TO ACCESS ROBUX GENERATOR', further supporting the lure-based attack pattern. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a phishing campaign.

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.co/app/431946152/cheats-to-get-cars-in-car-crashers-2-roblox-game-hack In PDF document text
    • https://mbbs.hr/files/how-to-get-free-accessories-on-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-obc-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/robux-website_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coinmaster-com_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/unlimited-robux-hack-for-computer_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-hack-robux-in-roblox-script_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-no-human-verification-android_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/ulgames-resources-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-no-verify_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_off00002d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D83 22356 bytes
SHA-256: a1d82316f2cb1110883f9d260b46386799cd51430bc3290238efd140df0821b6
font_01_sfnt_off00005f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 18880 bytes
SHA-256: 45dbfd1e7aa198c64c80b838d0193abeee0fc73414f1b1edd78db3e55cfa0dff

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