Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88bfafd172fa4ca…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 13:00:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 65769c4e6b2ac902b47c54670d7c3393 SHA-1: f743cd236ac97661ddfff103f10ad0c787991cc0 SHA-256: a88bfafd172fa4ca067f8dc129169992aedb42e181be636a3e528fb654ec6953
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-play-now-for-free-game-hack PDF link annotation
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/auto-keyboard-roblox-free_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-no-verify-or-download_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/zeph-march-2021-has-roblox-been-hacked_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/well-hack-roblox-pc_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-free-robux-2021-2-4_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/do-you-want-free-robux-get-unlimited-robux-generator_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/get-robux-for-free-and-quickly_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-scp-site-61-roleplay-free-morphs_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/epic-mining-2-roblox-hack_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-cheats-picture_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-free-robux-2021_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_off00002ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA5 22684 bytes
SHA-256: a036d22c43f7d7a08d126d4460c699aa0da8f84ddb1989d920f468fd17c0dced
font_01_sfnt_off00005e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E58 19148 bytes
SHA-256: 686d2062e78f1df2d276c91edbad0d84cda926d52b0f640b8f5b427429c15233

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