Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13f3d734905c7e0…

MALICIOUS

PDF

34.5 KB Created: 2021-06-21 08:53:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a09c9de9b4f640bcc7a14b0b7de88c67 SHA-1: d15492d69ec8dd3f3dfa85c4764ce91545902da5 SHA-256: f13f3d734905c7e08c2712aacdc9f652db7b425dca0965d65cb998a5fe2129d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free generators to entice users. It contains multiple embedded URLs, with the primary one identified as a malicious redirector. The document body and heuristics indicate a clear intent to redirect users to potentially malicious websites, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious redirection workflow.

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/free-face-roblox-face-anime-girl-blushing-game-hack In PDF document text
    • http://cornerwebstudio.com/images/roblox-oof-combat-hack_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-ios-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-parkour-hack-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/new-roblox-jailbreak-hack-exploit-walkspeed-noclip-gravity-and-more_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-cheat-in-roblox-parkour_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-hack-unblock-roblox_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-roblox-scripts-for-studio_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/does-hacking-on-roblox-get-u-banned_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/rbxoffers-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
font_00_sfnt_off00002f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6C 22356 bytes
SHA-256: 34d9670922d6f7e9754b7b4a5b9acb451544567ad6461212f3f43856e5245f29
font_01_sfnt_off00006147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 19336 bytes
SHA-256: 76ae3e806a46bb1e4412336b49ecfb73363bc57561ad578a5e9bb6160e07b35f

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