Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f5aa4f763579d2…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 07:50:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e2246567f73f2bcc2d9115a95b75ae6e SHA-1: 30fc7e85a7276fb3fc1c38b39d28e821998c125b SHA-256: 19f5aa4f763579d28ad33a4d9d1f77eca11780774204e32af41f94431878f767
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game cheats and free in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts other malicious PDF files. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-dragon-adventures-cheat-game-hack In PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/app-master_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/how-to-upload-audio-to-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/roblox-adopt-me-hack_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
font_00_sfnt_off000030b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B6 22084 bytes
SHA-256: 13d2ec0c01485876b9dd18d18c0d666e68ec6d358b29af0d8981d0ab31a08ba3
font_01_sfnt_off000061bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BD 19352 bytes
SHA-256: 5d2c119ef71883dc3b5a255334bb139882be8f04961eaff64d4c75b141a4c8be

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