Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd54fab13e5cb31…

MALICIOUS

PDF

43.7 KB Created: 2021-05-11 14:01:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2951442e16eec36f7a3a1533baeac5da SHA-1: ded814b16248ac9516a0d020979a60fca4d9b787 SHA-256: bcd54fab13e5cb3179a031cb8a51cc155196112512e5eca1b1999a9591886b20
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically to the URL https://netcdn.xyz/app/431946152/easy-robux-today-com-game-hack. This lure is designed to trick users into clicking the link, likely leading to a malicious download or further phishing attempt. The document body, though heavily obfuscated, also contains this primary malicious URL and several other benign-looking URLs that may serve as decoys or part of a broader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/easy-robux-today-com-game-hack PDF link annotation
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/free-robux-no-verification-no-download-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_off000049d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D8 27784 bytes
SHA-256: b91062b2a219b2e59604fdc40adf6b3617b943ffdea962b53c6cdd32a9dab5cf
font_01_sfnt_off00008727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8727 18692 bytes
SHA-256: 73d558874ba1f93a48afe8e813aec995f67c91820d85dfc512325dae3e965bb9

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