Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c45b1e402aec45f…

MALICIOUS

PDF

40.5 KB Created: 2021-05-14 17:30:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 158921bcddcc8c62a1265ca8f2ddeaa8 SHA-1: 306331f4151d4b761cf5a4f0b37fd6425357117f SHA-256: 9c45b1e402aec45f779c92bd67289ddfb472d822aa9ebe9d26b222244e77db10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector, promising free in-game currency. The document body and heuristics indicate a lure for game-related cheats or generators. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for JavaScript execution or redirection to malicious content.

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/free-coin-link-for-coin-master-game-hack In PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/www-bandicam-com-free-robux_GM431946152.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_off000047ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47AB 23660 bytes
SHA-256: 93e65caa242db67fb81c066be1df65f2c7525e2858f07a90dd51f8b2c257855a
font_01_sfnt_off00007d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D35 17880 bytes
SHA-256: 0625e4176a7f53d001741f6455d720615efffd3608056e1f92d89c9c6799a538