Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b8a82d73fd69a3…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 13:47:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0c0789c660ed4fedbfa64c6552f24170 SHA-1: 7b3818a62825486a34f6459af612e4adbaba71ce SHA-256: d0b8a82d73fd69a3cf522d7d15887db4d6c8bbed7a50adda79a16c746997a057
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators' for popular games. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded links and the lure text strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-website-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-pe_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-roblox-dominus_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_004_off00004fe3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE3 25304 bytes
SHA-256: c73c57f8c0686a7242c603f440fe64dac32673b1c9e06c45ca2f21987c196bca
font_01_sfnt_off00008989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8989 17900 bytes
SHA-256: decb0c413fa85b8530be01f527249ec626c34e53c28067a93855c78243a97237

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