Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf2cb254b81874a…

MALICIOUS

PDF

44.8 KB Created: 2021-05-17 04:47:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 45d08f0afc1764321cfc62978cef26d8 SHA-1: 6cc5e94d04b43177f8ebf16401940a9e9db830b2 SHA-256: cdf2cb254b81874affecb49c0f38c9b8a766ecf24778cabd1706d17214a44512
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game generators and hacks to entice users. It contains multiple embedded URLs that lead to redirector infrastructure, ultimately pointing to potentially malicious content. The document's structure and embedded links suggest it is part of a phishing or scam campaign designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/moon-static-coin-master-generator-hacks-free-game-hack In PDF document text
    • https://diendientuvn.com/public/upload/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-generator_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F2 24856 bytes
SHA-256: 0ef8e977165fb87e62fe37e890994cb2d94715aa1c56ee71fc3db58972b383e4
font_01_sfnt_off00008280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8280 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAA 17880 bytes
SHA-256: 12faecc5962592d277de3e4fe4bc4692cb4c94937b2745323735b12f582b8c4f

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