Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5b718a1a66e464…

MALICIOUS

PDF

42.9 KB Created: 2021-05-18 06:09:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b94a993a16af92707cf7d5c2ce7e907d SHA-1: 8c7df707a43204ead0197ce421ced7b77b7deaea SHA-256: 2d5b718a1a66e4640c364681b63397f74de50b39948eee4c991f3dd2f9ffef32
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to pages promising hacks and free currency for games like Coin Master and Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of these lures suggests a phishing or scam attempt. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to further malicious content or credential harvesting.

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/406889139/how-to-earn-free-spins-coin-master-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/toolbox-for-minecraft-pe_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_off00004b05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B05 25584 bytes
SHA-256: ce7e8d7092a696b7cfdba83b061063642a976394c80625e5ef445a7a794332d0
font_01_sfnt_off00008629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8629 18052 bytes
SHA-256: 3c90058a0459d49c606198fd695e9726967f61199941b7ff7c4219412436d59a

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