Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5cca88daa69e1ba…

MALICIOUS

PDF

44.4 KB Created: 2021-05-18 01:32:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: abff94cfcc04e37c88600b71ddc02bab SHA-1: 191aeb4fe5594d23d3c9621e19558c3eb768821c SHA-256: b5cca88daa69e1ba1f088f4555fee673231c27e32a128329abf2fd52f7ce2767
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to game hacks and free currency, directing users to malicious redirectors. The embedded URLs and the document's content strongly suggest a phishing or scamming attempt, likely to lead users to further malicious sites or downloads. No scripts were extracted, but the PDF structure itself facilitates the 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 https://netcdn.xyz/app/431946152/bux-life-free-robux-game-hack In PDF document text
    • http://easytransferbrazil.com/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/robux-best_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-free-robux-no-verification_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_off000049c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C7 28380 bytes
SHA-256: 83e1c132dda62bfd417b0b920197c17c7900acb7cb79c599a082889514ae7a18
font_01_sfnt_off00008bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD7 18136 bytes
SHA-256: 29dc967668ee0d992c179c4e94ca6f9cb219d50b5ccf800f63d20fdab69e699e

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