Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e160a6bf1bc81b…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 01:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c6caa2f92788a37daaacef0b09cb733a SHA-1: 0870e67d740437d831111035041ca1f985aa22db SHA-256: c1e160a6bf1bc81b0f93e45bbbb4a82f5dabe2728d212011447bafd5b2ff70b4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-use-no-clip-hacks-roblox-2021-novenmber-game-hack PDF link annotation
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/robux-hack-2021-generator_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/robux-generator-no-verification-needed_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_off00003087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3087 22144 bytes
SHA-256: 1cb3331e60c82dc0f989a7359b9c513cbf5a1dc790f9cbb817b622e42b3823ed
font_01_sfnt_off000061a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 19892 bytes
SHA-256: 5e64249ae7a61187f7daa0687ac0f2d9200c5e6342b0aee1699410e96efdbc57

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