Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ffc9b49e6818ef…

MALICIOUS

PDF

42.0 KB Created: 2021-05-16 22:25:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5a70923785e27d45cfae269b471a3200 SHA-1: 7c242f078fe9ac33c2afeb6f028ce2dfca1350cd SHA-256: c2ffc9b49e6818ef1cba05f41719d4663f4f9bdd9968df9c03a0b035baa51aaa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games like Roblox. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious workflow. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest it is designed to trick users into visiting malicious sites, likely as a lure for further malware delivery or phishing.

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/431946152/info-roblox-com-robux-game-hack In PDF document text
    • http://calavera.be/images/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://calavera.be/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://calavera.be/images/instantrobux_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://calavera.be/images/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://calavera.be/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/get-robux-now_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://calavera.be/images/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/coin-master-hack-2021_GM406889139.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_off000045f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45F7 26160 bytes
SHA-256: a19b36a4e7033c81beb21d4bca6f488b0edcc6c8ec4e1915d4bd3f437eed6272
font_01_sfnt_off00008218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8218 18184 bytes
SHA-256: 2666f19638e8a85676fd26a40fcd2c9ad598b57ed36ce75be6242751bafc6488

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