Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c811c53f117ed4…

MALICIOUS

PDF

41.4 KB Created: 2021-05-13 12:34:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 04594b413ce8edcc66726bf43ad6b535 SHA-1: 1490f035e42ddda8cafb8c8fd73777fe7ec2ddea SHA-256: 33c811c53f117ed47a13d889fb863d7dc0726d0573b6797182ba49c34abf68e6
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 0.9971

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 https://netcdn.xyz/app/406889139/free-spins-coin-master-links-game-hack PDF link annotation
    • http://studio-dentistico-fiume.com/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A7 24664 bytes
SHA-256: 75a9505e14323b7e871c4befac30a55c13bf900b66e9cf7c978a397c15222c6d
font_01_sfnt_off00008018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8018 18056 bytes
SHA-256: 07f1a9832fff0ce02b8ea8bcbd6448fb7022c7ac6c85a00fb5b887865844234a

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