Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db5686c1b694e18…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 07:32:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d99d4c0109fd295684db674c82f665ad SHA-1: 313498679c8d4ccd6e2ad5656fa25fdfcf4f8807 SHA-256: 4db5686c1b694e18a766e193823f1e46eca0aaac2bad85b87650fc94b71a8676
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/479516143/minecraft-hack-mod-game-hack PDF link annotation
    • http://raqam.net/uploaded_files/userfiles/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/real-robux_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/roblox-verification_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/robux-in_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/free-pe_GM479516143.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://raqam.net/uploaded_files/userfiles/files/coin-master-rewards-2021_GM406889139.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_003_off00004a01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A01 25000 bytes
SHA-256: 5fac737e1d474dc1cff60f430b3f1ac37815a5d325d4b35851eb5890ed6b167f
font_01_sfnt_off000082c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C6 18056 bytes
SHA-256: c98163390533840513273057c02ab8b0002c23ddfc36b9b9583c7d176bc18763

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