Malicious PDF — malware analysis report

Static analysis result for SHA-256 1647fc456e6d0f09…

MALICIOUS

PDF

47.8 KB Created: 2021-05-15 16:02:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9c99b2036a3e1c38a2b30bc2b51b0814 SHA-1: abf36b04e94d926e59001841997a229a2993d94f SHA-256: 1647fc456e6d0f09943276e565934c2cf4b5ea4205147ceea607ff262a53caf4
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 0.9977

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/how-to-get-free-robux-by-playing-games-game-hack PDF link annotation
    • https://amiranet.com.br/files/files/offers-for-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/minecraft-esp_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/moon-active_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-you-get-free-robux_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_003_off00004aa3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA3 31940 bytes
SHA-256: 43d2cb597d837823f9801eb1953e6941d1163d826e53f112f4613290c2b18621
font_01_sfnt_off00009546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9546 19588 bytes
SHA-256: 4959be52701d88ef79c98b835575558ad206ad5c377459138293e90af74f97c3