Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fe4f23524d7038…

MALICIOUS

PDF

31.7 KB Created: 2021-07-03 22:28:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c8cf9c78604f93526ea962c06404d3a3 SHA-1: 34d6de46705d47ac325587e18ba82276a9448d57 SHA-256: 30fe4f23524d7038c6cdf2aa1319f3963cc0a86e1ce5bde81d3175dc00a46433
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency, specifically mentioning 'Robux' and 'game hack'. It embeds a URL that is flagged as a malicious redirector, likely serving as a gateway to a phishing site or malware. The ML classifier strongly indicates maliciousness, and the overall structure suggests a social engineering attack to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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 http://netcdn.tw/app/431946152/how-to-get-free-robux-real-2021-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/wurst-112_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/this-group-gives-free-clothes-robloxs_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/no-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-400-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-hack-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-do-you-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3169 22312 bytes
SHA-256: 7ee6bcd88b4d93350f095da6f0a2b4106fc4ed37005bdf9e730e75862d25eec7

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