Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d89449a7b2aab80…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 21:07:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9fdd88fb4afb9ec2a01e0ea917ddec88 SHA-1: 1b27a9c25f500690e0b616a5e772b09db3b4a214 SHA-256: 3d89449a7b2aab80a88263175dc27225ebef3af8a81d47f00556e2d5272ede55
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/431946152/robuxy-com-free-robux-game-hack PDF link annotation
    • https://www.devries-group.de/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/robux-prices_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/free-spins_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-hack-roblox-games_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_off0000490c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x490C 25208 bytes
SHA-256: eb3a0e1aab106307321e83b8fc07625a921b5927a70616becc8fe17be95572bd
font_01_sfnt_off0000828e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 18452 bytes
SHA-256: 502ad6067225007cfeab5155f8ca615546b56d7ab4478b734f537abd02c25d18