Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc16c0fd136f1d8d…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 16:35:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 38ed14bfe2a696181f5463e39993bca3 SHA-1: f46d08279bb0d8789216f1c1ea7317ba704a5fb7 SHA-256: cc16c0fd136f1d8dfdeee66829855cf9c2e217c8bf9c6802dbc93ba0e7582ef0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, a common lure for malicious content. The embedded URL, https://netcdn.online/app/406889139/static-moonactive-net-link-game-hack, is the primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to trick the user into downloading a secondary payload or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/static-moonactive-net-link-game-hack PDF link annotation
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/trybox-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-for-surveys_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.marshlands.staffs.sch.uk/admin/ckfinder/userfiles/files/universal-minecraft-converter-free_GM479516143.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_off000052ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EC 24884 bytes
SHA-256: 2a4524d0dd7c5b20cb99957dd70285ad07e38543dd4df3faba2f7ae16be236cb
font_01_sfnt_off00008b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4C 17828 bytes
SHA-256: f1c4875db67d08a7f015f46d5edb04ada9e055205be7e1056ba7c59babce098d

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