Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e621a01b9fa11a…

MALICIOUS

PDF

42.1 KB Created: 2021-05-11 01:41:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5dd761af1754c72df2fb56abea2dd4df SHA-1: 894632fbbd804721031c44ec3df9276e814fba6e SHA-256: 86e621a01b9fa11a1845975c3efa78b38ad943c06aef8e24216923a2ce74c316
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting game hacks and free currency. The primary redirector URL is https://netcdn.xyz/app/406889139/coinmaster-game-hack. While no scripts were extracted, the document's structure and embedded links strongly indicate a phishing or scam attempt designed to lead users to potentially malicious content or further 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/coinmaster-game-hack In PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-robux-for-kids-no-verification_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_off00004ac1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC1 25300 bytes
SHA-256: a755b22b79028b93e2e6c822eee02cd76869aaabb0cad3089c9ed9bf96e16457
font_01_sfnt_off000083cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CD 17808 bytes
SHA-256: af208cdb45bd073d7b5ba90b2b5d7fe18c625e7bd90d48e59b2ee82d337b8146

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