Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d03b7e16c6a342…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 20:28:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 23fb3dd661c951df422a940118d52b2a SHA-1: 3ae46067d105d4194aa47d0662b65ccf7e89b509 SHA-256: c5d03b7e16c6a342a9c746d434897d715cc5c7a8936be4c1649977c6fb58fb2f
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/roblox-robux-hack-game-hack In PDF document text
    • http://www.hlad.hr/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-make-everything-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/free-roblox-game-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/robux-games_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-ninja-head-for-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-a-free-roblox-gift-card-code_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/hack-coin-master-apk_GM406889139.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_off00002ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBC 22692 bytes
SHA-256: 119a0c752fdcbec391911eb6e98e0c4f8f27b9f1d49f0a931c3f60ca808be38c
font_01_sfnt_off00006120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 18796 bytes
SHA-256: ac85a7f36e8d2c6b778aa8e0527eba638abc788d16e2325ecdb460050b0ba6ed