Malicious PDF — malware analysis report

Static analysis result for SHA-256 475882b8d9cc77fc…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 23:18:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 500788368033ab5f439ffaf0fda72a29 SHA-1: 2a63224e3f5c63a044b14ea75ac236a7ba1fc39c SHA-256: 475882b8d9cc77fc400fed08b16e9bedd4a83a36b257dc9a0f6c2e099d53025c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary malicious URL identified is http://netcdn.co/app/431946152/free-paint-hwo-to-draw-a-realist-eye-roblox-game-hack. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting these sites, likely for further malware delivery or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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-paint-hwo-to-draw-a-realist-eye-roblox-game-hack In PDF document text
    • http://www.my-travel.com.hk/upload/files/codes-free-robux-on-bloxland-youtube_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-roblox-ames_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/fly-hack-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hack-tutorial_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_off000031ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AC 21996 bytes
SHA-256: dcf69f2d0e11c71a829441cf17fce67e85888269d9b112c8494bf702734ed0e7
font_01_sfnt_off0000626b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 19540 bytes
SHA-256: 87b133b22a8261d66dcc03c894cdf4511934172242b0f6e6195e1598e071a8dc

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