Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa3e2cc9b728a26…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 02:18:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c6b42696d624e01e806ea4abef263fd2 SHA-1: b236fdd568b6c4bc0ad7943fd388b80545b23535 SHA-256: 9fa3e2cc9b728a26de10d61951e6fe9107374f16cd8f1a0f8dee7ea3b2053488
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) 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 0.9971

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/bloxawards-com-earn-free-robux-game-hack PDF link annotation
    • http://esm-royet.de/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://esm-royet.de/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://esm-royet.de/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/wurst-client-download_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_003_off00004842.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4842 26076 bytes
SHA-256: 310c2421457498a24cbbc322c086cbe448fc4ade4f4fd9ce1fe8964fb9eb2bcd
font_01_sfnt_off000081ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FF 18916 bytes
SHA-256: ad6cfd8b97476ff22bd965746e6d59def3dc1c42c07a754b956efad1c533161c

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