Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffbc63359b3c2d77…

MALICIOUS

PDF

35.5 KB Created: 2021-07-08 01:23:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d338287e767f3e013dc6f5a97e3c6f6d SHA-1: 6c13838607ba8103ca5656ddfebc269c7417db82 SHA-256: ffbc63359b3c2d775fe077f440d7187ad5282a3abcd436810d7aab3b62c73988
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that mimics a lure for free game items, such as Minecraft or Robux. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the content strongly suggest an attempt to redirect users to malicious sites for downloading unwanted software or engaging in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/how-to-get-minecraft-windows-10-for-free-game-hack PDF link annotation
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-robux-no-password-or-phone-number-needed_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/jukebox-free-script-roblox_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-robux-works-in-an-hour_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-get-free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-get-free-robux-place_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-roblox-accounts-that-work-100_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-get-free-robux-in-game-on-computer_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/hacking-websites-roblox_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-robux-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
font_00_sfnt_off00003437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3437 22712 bytes
SHA-256: 2517fe37b19b68781e5ad2086e5b3afc04f30f24116b3fafac75ce99b3d19c19
font_01_sfnt_off00006658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6658 18812 bytes
SHA-256: 78af6c1a79895a4d6094e0f9df7a7bf166215c31d8c8ac3ce0b9542e24fb5cba

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