Malicious PDF — malware analysis report

Static analysis result for SHA-256 815b5655252889b5…

MALICIOUS

PDF

35.4 KB Created: 2021-06-19 18:06:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 05954427da1eb62855c12d765100afe7 SHA-1: 07e5b29de14cb71e875f210822facbc583d8a462 SHA-256: 815b5655252889b51ed9e1b136625cae4077a549bef4d0e7e69e8edf7051484b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with the primary one leading to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for 'game hacks' and 'generators', suggesting a social engineering tactic to trick users into visiting a malicious site. No scripts were extracted, but the presence of malicious links and the lure pattern strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/robux-generator-that-works-game-hack In PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/whats-robux_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/hack-para-tener-todas-las-trasformaciones-de-dbr-roblox_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-hacked-blocks-in-roblox-build-anything_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://www.st-michaels-lichfield.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-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
font_00_sfnt_off00003220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3220 22624 bytes
SHA-256: fbbcd3549519e253b46c9f8b1b75f3bfdd356aaf0475927a6410e3fffe2a5357
font_01_sfnt_off000064c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C8 19188 bytes
SHA-256: ccc77926c6d9f36711ba9a2232d7c5723157e500c42e1f45c9b9e4f6db9b0194

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