Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8552588a160c35a…

MALICIOUS

PDF

31.7 KB Created: 2020-05-13 11:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 97c9eb0b96e4fb8fe789fcff29ad0514 SHA-1: 01749cffe637640ddf86eedcd014f36750591408 SHA-256: f8552588a160c35a4e4979614908b38193a623f21af85aa9b123f4060acf646b
70 Risk Score

Malware Insights

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

The PDF file contains a SE_INVOICE_LURE heuristic, indicating it's designed to mimic an invoice or payment request. It also contains a PDF_SEO_LINK_FARM heuristic, which points to a large number of external PDF links hosted on various domains. The primary attack pattern involves directing users to a link farm, likely for SEO manipulation or to host further malicious content. The embedded URLs are the highest priority IOCs.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://bloodblisterapparel.com/uploads/1/3/1/6/131637701/131637701.html#investopedia+balance+sheet
    • http://jennifermerrilltherapy.com/uploads/1/3/0/2/130272488/defopup-rulew-vugesirinuzis-saxavif.pdf
    • http://emiliefoy.com/uploads/1/3/1/4/131453857/tuzexujevinigodarupu.pdf
    • http://bloomyoganc.com/uploads/1/3/0/6/130639664/9606683.pdf
    • http://clinnovations-lb.com/uploads/1/3/0/8/130813784/bibiz-sowaxutonidema-mitujusexozomup.pdf
    • http://style-now.com/uploads/1/3/1/1/131164033/5327667.pdf
    • http://shophhc.net/uploads/1/3/1/4/131452917/ac44a1d321.pdf
    • http://myleokingspage.com/uploads/1/3/0/4/130489909/wawiw.pdf
    • http://thatsustainsme.com/uploads/1/3/0/5/130588427/gitexigikekokubas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005434.bin
ba984b439b223705919963cd6cc851eda3fada6f7dd1941fad35efc06ccd44c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5434 9332 bytes

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