Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b439e9702b318e…

MALICIOUS

PDF

42.8 KB Created: 2021-05-15 09:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 40f2f74815a521de6744a5dba0629615 SHA-1: af32581f04ecb2af6fbbbb1fb1200091fdf5fe3c SHA-256: 58b439e9702b318ef2fe31e9cf14c51fe457946015a038f42c447a9be07d9a85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into downloading game hacks or generators, redirecting to known malicious infrastructure. The document body and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

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/coin-master-unlimited-coins-hack-apk-download-game-hack In PDF document text
    • http://calavera.be/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/how-to-get-free-robux-2021_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 25236 bytes
SHA-256: b14b77525238ac920c8ea8b177a8d23e901358f7b98d257173a0fb438e45bde0
font_01_sfnt_off000082ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82ED 18916 bytes
SHA-256: f0d587adf4f6f4957022720a1ba7dc12899eb6a2139247dd603e63f7db2e4ec6

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