Malicious PDF — malware analysis report

Static analysis result for SHA-256 58057e31920f3614…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 17:10:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4a92e112799dcd06f58d9a7678bffb51 SHA-1: 132090a07278fc2abd9e6cc910d95154865a5a78 SHA-256: 58057e31920f36142acaba0190cac5b4782f7e2123b6affbc29e5f5ec05aa165
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'free Robux' and 'game hacks'. The document body and heuristics indicate a lure designed to trick users into visiting these sites, which likely serve as a distribution point for further malicious activity. No scripts were extracted, but the presence of malicious links and the lure content strongly suggest a phishing or malware delivery attempt.

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/free-robux-generator-without-verification-game-hack In PDF document text
    • http://keepcasscountybeautiful.com/images/free-coins_GM406889139.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/master-coins-free_GM406889139.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/robux-giver_GM431946152.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://keepcasscountybeautiful.com/images/coin-master-spin-free_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_off0000497c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497C 25328 bytes
SHA-256: d93a569ce31979e5160e7fd09e03b38f4bc5341d275608db59c379adb5fc29ef
font_01_sfnt_off000083f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F3 18964 bytes
SHA-256: 28b129fa50d9ed943d388e6dee4b9579dbddb2c3d46c54f90e146500d20faa97

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