Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3f20706bff0dd8…

MALICIOUS

PDF

33.8 KB Created: 2021-07-19 19:10:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ff301566e1344213049fa2e6f31899c9 SHA-1: 20656baa816588878d8ee4676f1df27b36487211 SHA-256: fc3f20706bff0dd84ed274bfc0f8ac221d4d02628275a3fa2c007dd518043987
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering "free Robux" and "game hacks", which are common lures for malicious redirects. The primary redirect URL, http://netcdn.tw/app/431946152/free-robux-no-verification-2021-game-hack, is flagged as a known malicious redirector. The document body and embedded links suggest an attempt to trick users into visiting these sites, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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.tw/app/431946152/free-robux-no-verification-2021-game-hack In PDF document text
    • http://www.sscs-uae.com/userfiles/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/minecraft-skins-free-girl_GM479516143.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_002_off000029ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29FF 23504 bytes
SHA-256: 2c59f9f1231784000607aca8f1ce926baaf1dd3ba5f309ea028f8eacec4f65f6
font_01_sfnt_off00005f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5F 19188 bytes
SHA-256: 1d678ccb09ca7ab390fe1cb16a54ee3a19d850daf1d3792b9105ae8049b7bbf5

Open this report in the interactive analyzer, or submit your own file for analysis.