Malicious PDF — malware analysis report

Static analysis result for SHA-256 3751734a9ead10ec…

MALICIOUS

PDF

46.0 KB Created: 2021-06-07 08:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0406541d2976cd4b146d0ecd58c59730 SHA-1: 487bb69b73f9a74b2ea97fe4a4950222803d0cba SHA-256: 3751734a9ead10ecf09e5bb30278d0f8bb7aa1635c95440cc601014821900413
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 0.9864

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.tw/app/431946152/click-for-free-robux-game-hack PDF link annotation
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/generate-robux-for-free-with-no-downloading-games_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/roblox-all-gamepasses-free-script_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/free-robux-daily-rewards_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/free-roblox-gift-cards-pins_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/hack-for-pf-roblox_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/free-robux-site-youtube_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/noob-vs-pro-vs-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/roblox-hack-de-cuentas_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/how-to-make-sure-your-roblox-account-doesnt-get-hacked_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-tablet-easy_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/how-do-you-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/gget-free-robux_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/foro-hackers-roblox_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://oak4x4messinias.gr/wp-content/uploads/fsqm-files/commands-for-roblox-free-rubux_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
stream_004_off00005239.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5239 27556 bytes
SHA-256: 1dedc509c48f1937b5676e123f8faaa0bce163ac991d46db8e0a9f9ca41956bf
font_01_sfnt_off0000912b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912B 18380 bytes
SHA-256: c9d5486bec7046583dbef88faf7e01cc5d3867a79634263807b598fddcc9b244

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