Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6ce75d2eda1ed9…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 05:34:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2e957e84df57c34d6d6deace280daae8 SHA-1: ea9fc76198ea8631b5067b5e9cd3fb956d9bcffe SHA-256: cd6ce75d2eda1ed9f3d0cc3e4eba3c25c587bfd3f04cf43a547221d9ada2063c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to 'free coins and spins' for a game, a common social engineering tactic. It contains a high-risk heuristic firing for a game hack redirector pointing to the URL https://netcdn.online/app/406889139/free-coins-and-spins-link-for-coin-master-game-hack. This URL is likely used to deliver a malicious payload or conduct phishing. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick the user into 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/free-coins-and-spins-link-for-coin-master-game-hack PDF link annotation
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/robux-apk_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_004_off00005407.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5407 25124 bytes
SHA-256: 5f2d5fbc58280e4b598711f738efd9133b466ffadc68f049c0ddfe9ab0f25747
font_01_sfnt_off00008cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDB 18228 bytes
SHA-256: fae37dc17ceb07b546b2f3d52ac1615337fed2095fc086aa036c35b62a4bdec6

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