Malicious PDF — malware analysis report

Static analysis result for SHA-256 8028e7e6d3087772…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 04:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6db2c7815a1b65ca92e266c299cae51b SHA-1: 775d0712598d1d959fdcc4fac46f643b5c1dc2c0 SHA-256: 8028e7e6d3087772115114535180e4653836657036f4d8db1d76bb2b02b5d655
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game cheats and hacks. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs and a link farm suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and content point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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/coin-master-hacks-game-hack PDF link annotation
    • http://lib.mbp.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-generator-no-human-verification-2021_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_off00005227.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5227 24884 bytes
SHA-256: 5d2e31a7e58b4d9c3f9f46eadc2d67b802e43e7b5c0e8fd423888a0cff49dfc0
font_01_sfnt_off00008aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AED 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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