Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d55cb24942efa5…

MALICIOUS

PDF

36.1 KB Created: 2021-06-19 15:50:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 472f4bdef267a41154e5d7d31a71e2c9 SHA-1: 3e1ce507343c05d2974ea8c01bf57ffbac54a3e7 SHA-256: 42d55cb24942efa5bcfce58fbeeba7947530897fa55da1f5277430b34a5fd2fd
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 0.9980

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.co/app/431946152/can-you-actually-get-free-robux-game-hack PDF link annotation
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/pokemon-go-five-free-raid-passes_GM1094591345.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-gift-card-generator-roblox_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/robux-maniac-free-robux-on-web-site_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-code-for-roblox-unicorn-2021_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/vehicle-tycoon-roblox-hack_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-minecraft-alt-accounts_GM479516143.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_002_off000033e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E5 23068 bytes
SHA-256: 18101977779313538ab6b3504246b39994e4ff8944fb67bdb01545d1f094fc4a
font_01_sfnt_off0000679e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679E 19236 bytes
SHA-256: 69c4431739351b00a600d7d7f37bad921e04cf18c9925a88828c1213d2b8bd26

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