Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fbbe8d3f138224…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 07:31:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b5e6f2a2a9e1acedfab9a2092cc3aaae SHA-1: 64d0c5ea14d41ed98b417bfcae82a99a8ae28084 SHA-256: 35fbbe8d3f138224d4ba99cf342cd90b4888dc23c5eed9d10c1788315f6ed85f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple external links, identified as a link farm, designed to lure users with promises of game hacks and free currency. The primary lure URL is https://netcdn.xyz/app/406889139/pig-master-free-spins-and-coins-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content or further stages of a campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/406889139/pig-master-free-spins-and-coins-game-hack PDF link annotation
    • http://www.metanoiaconsultantsglobal.com/images/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://www.metanoiaconsultantsglobal.com/images/free-roblox-hair-girl_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_off00004b26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B26 25000 bytes
SHA-256: 343f5210fa76f60fa574c20903d57a47e480582870884f4c4a5bdc3b9d5c9c56
font_01_sfnt_off0000839b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x839B 18504 bytes
SHA-256: b9daa9c4da3c373732a9c29a046200b4b0d9483042be4cb87cf28c35010246ca

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