Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8bc01edc2648fc…

MALICIOUS

PDF

47.3 KB Created: 2021-05-31 11:22:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 70c7cf5b02d145cfa92e3f8e0c31c9fb SHA-1: e75637237156a613667dfe1c53b7e55edc5ca4bc SHA-256: ae8bc01edc2648fc7769107bb7b1f7e954456e98e58975bede30ee3c9a7127e1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are SEO-optimized and point to content related to free in-game items or currency. The ML classifier also flagged this PDF as malicious. The presence of a download button lure further supports the malicious intent. The primary goal appears to be directing users to potentially malicious websites for scams or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.xyz/app/431946152/how-do-you-get-robux-on-roblox-for-free-2021-game-hack PDF link annotation
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/how-to-get-free-robux-wiki_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-robux-no-survey-or-password_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/coin-master-free-spins-2021_GM406889139.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_off000056e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56E6 26596 bytes
SHA-256: 0573ac1a11136d0af9126345b871a5636919acdca6efc456ca255346a72f5a4e
font_01_sfnt_off000093d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D1 19088 bytes
SHA-256: 413856a494aa2be281c743bae835383517f9ddb6b4054e44643c60d3ff2f2edb

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