Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d0253b14885eb1…

MALICIOUS

PDF

41.1 KB Created: 2021-05-19 00:13:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 20f1a549adf7f1aa0dace4ca7ee6f743 SHA-1: afa602fa00ca835dca55b107206c5f5976ecff6c SHA-256: b7d0253b14885eb1235fd711806c19f56d4910952fbad6940d3d07a7792e320f
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 document body and embedded URLs strongly suggest a phishing or scam attempt, likely to lead users to sites that may host further malware or attempt credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/spin-and-coin-link-game-hack In PDF document text
    • http://uctaren.eu/images/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://uctaren.eu/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://uctaren.eu/images/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/lazyblox-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
stream_003_off00004881.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4881 24212 bytes
SHA-256: 94ef2c8bc9a6bc779ae672b5cfa5e13eb09be988c5878248d0e09bcc7a9936aa
font_01_sfnt_off00008014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8014 17736 bytes
SHA-256: 712bfdfe30982b1ff8f7dea34df7c3666928d55570c192a0b250fd08dd003b23

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