Malicious PDF — malware analysis report

Static analysis result for SHA-256 f535f7ffa5f5eeeb…

MALICIOUS

PDF

43.9 KB Created: 2021-05-14 06:34:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1bfe12734c61a88a5fd96240a802fd1a SHA-1: f608151249afab78bf521b1f65a6d0a4eb84fdf2 SHA-256: f535f7ffa5f5eeeb665ecf744aedc2c71ab02a49065ac558aa1799d2aaac2780
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 redirector identified is https://netcdn.xyz/app/431946152/robux-generator-no-verification-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/robux-generator-no-verification-2021-game-hack In PDF document text
    • http://www.maakherumusic.net/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.maakherumusic.net/images/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.maakherumusic.net/images/link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/robux-game-com_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://www.maakherumusic.net/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.maakherumusic.net/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://www.maakherumusic.net/images/roblox-free-robux-hack_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_off00004b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B67 25648 bytes
SHA-256: 83df8791b91f44222c363d9e6ef2266a087e2b6568305234b8a9368f1ab40ab5
font_01_sfnt_off0000875a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875A 18836 bytes
SHA-256: 70c9af4927528042a9e3503934bee4caa1d9283cda5f59bc037173645e872bda

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