Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd092dd62df6540…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 18:11:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ad71c5479511a5f7e8dcb2e191924538 SHA-1: f03a0aecd98bdaeceb9465e2ff23ff3fc01a8ca4 SHA-256: 3cd092dd62df65403c76438fe7fa115ae8a562ae23f9c73fa50082e278922f00
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The document body, though partially corrupted, includes a URL that is also present in the heuristics, reinforcing the malicious intent. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-hack-roblox-game-hack In PDF document text
    • http://5prudov.ru/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-hacks-for-gold-cards_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_off00004a2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2E 25196 bytes
SHA-256: edd3887ff55435487bb31cc41bddbbb8b03cdd8fef157a6fe3db31141eb191a2
font_01_sfnt_off0000844b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844B 18344 bytes
SHA-256: 73440050ee62d9c8dc97d7cf0d13859b5ca63a66159f36279ab18a86d0bf293f

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