Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ff55e747932996…

MALICIOUS

PDF

33.1 KB Created: 2021-07-19 16:02:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f3f956f536012bfec251bc96360dc3ac SHA-1: 6d8041a039aa34f0e1e601c7cdfddcc54467695e SHA-256: 66ff55e7479329966d3b7df6b105efd50c8b890b11cb10e9f21b1eb861b4f143
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector domains, specifically advertising 'free Robux' or 'game hacks' to lure users into clicking. The primary redirector URL is http://netcdn.tw/app/431946152/rblx-city-free-robux-game-hack, which is associated with malicious activity. The document body also contains a call to action, 'CLICK HERE TO ACCESS ROBUX GENERATOR', further reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/rblx-city-free-robux-game-hack In PDF document text
    • http://verenacrow.at/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://verenacrow.at/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://verenacrow.at/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://verenacrow.at/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://verenacrow.at/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://verenacrow.at/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://verenacrow.at/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://verenacrow.at/images/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://verenacrow.at/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://verenacrow.at/images/minecraft-java-edition-free_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
font_00_sfnt_off00002adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ADC 22688 bytes
SHA-256: a39dbb190a24c914968f4c5f979ca7c51e4137d3ec53ad0ccbc86b4a595afb2d
font_01_sfnt_off00005df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF7 18680 bytes
SHA-256: ce3d52f7a93c593ce2eefb8e45dcd2efc7f486213a1d54846bed04cc16d50f6a

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