Malicious PDF — malware analysis report

Static analysis result for SHA-256 127bfcc645ec9050…

MALICIOUS

PDF

41.3 KB Created: 2021-05-10 18:10:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 13bbc68fdd4157d2c105c711cd368216 SHA-1: fdf03ee566a8179021a5c3d28a470dcc5919f723 SHA-256: 127bfcc645ec90501ced949cd51e7b649006c115bf5d20768df5265edc0b4d5f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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/hack-coin-master-spin-game-hack In PDF document text
    • http://suaedy-library.net/repository/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/hacks-roblox_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_off000047ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47ED 24524 bytes
SHA-256: ecd7f6885220665aaeb44b3db3bac0a2b0537192b3f2c569f7048617704879fe
font_01_sfnt_off00007fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE8 17892 bytes
SHA-256: 63d687d2565a339edd62320ef6ccf5acbe4aebbc1e54fe1d95ecff851c8744a5

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