Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f29a45b4df575fa…

MALICIOUS

PDF

33.9 KB Created: 2021-06-19 21:35:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 366dc86709c82c1f6a0e59567c318f03 SHA-1: 0e97e1167cf841458056244f579bb76d341ea7d9 SHA-256: 3f29a45b4df575fa4e0400238ba8256d6b6fde711786c0fd68a5a8da8df13c11
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which links to known malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/easy-robux-generator-game-hack In PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-no-verify_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
font_00_sfnt_off00002d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6C 22764 bytes
SHA-256: 902405950b73613f29d2bb018515ed181f3f9fbb3a5413ef9102a6a048c8bd13
font_01_sfnt_off00006054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6054 18836 bytes
SHA-256: 7ac84f08d6f3d8b5a5d053f3efaa940b63c7ffadd11ba48b4da121a10aff55c5

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