Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d3e946a307c2bb…

MALICIOUS

PDF

44.8 KB Created: 2021-05-16 20:32:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c62af0a491b8a61bae7203c161ac2b08 SHA-1: 007fd13bc50e30bca729697de0cc811976eb9667 SHA-256: a4d3e946a307c2bb2f0157a3adc1aefb570986bb4320ecc2957ea142729208a2
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-roblox-characters-game-hack PDF link annotation
    • http://bemviverclin.com.br/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-daily-gift-free-spins-and-coins-link_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_off00004beb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BEB 28220 bytes
SHA-256: 95e06a2671c3ca74891caa12d814d1e17196b292ac281933a9cd026c46263832
font_01_sfnt_off00008c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C51 18448 bytes
SHA-256: 0263947262242f4b31913ad3d0f55b2be151042c00d915c510b843208e81fc00

Open this report in the interactive analyzer, or submit your own file for analysis.