Malicious PDF — malware analysis report

Static analysis result for SHA-256 37521f5a6cf24b2d…

MALICIOUS

PDF

45.3 KB Created: 2021-05-16 20:35:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4342e671c30a81059744112f58be02ef SHA-1: 338841d2a4159cab37bb6f92e6138238a11b06c8 SHA-256: 37521f5a6cf24b2d138d3b890e99dd77ab0291fa1bd819a1d58f27b25938e0c3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt designed to redirect users to malicious content.

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 https://netcdn.xyz/app/431946152/free-robux-with-no-human-verification-game-hack PDF link annotation
    • http://www.visiblefilm.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/i-robux_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bcd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCD 27964 bytes
SHA-256: f81cbff24ae25c9cd4e0da21d0f6f856bfddf1eace36dbbb8a75ec47cda98c73
font_01_sfnt_off00008c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2B 19224 bytes
SHA-256: fee2af4c7f09d7ea12136e2767a6473cb73ac52634d47b0a6a367e18f3240d40

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