Malicious PDF — malware analysis report

Static analysis result for SHA-256 8effb872c263d66e…

MALICIOUS

PDF

39.5 KB Created: 2020-04-20 17:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 77928f30b8b66c563ce16c1b35b2d764 SHA-1: 20b5792557caab7c48cdf871f9416551bad92aa4 SHA-256: 8effb872c263d66e2ed518c21978c75f27fbdd6a5bd7e9d3ed93592ad7fe8632
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, suggests a lure related to 'measurement conversion worksheets 3rd grade'. The primary intent appears to be directing users to a network of linked websites, likely for SEO manipulation or to host malicious content. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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://advantagebpm.net/uploads/1/3/0/8/130814040/130814040.html#measurement+conversion+worksheets+3rd+grade
    • http://renartcapital.com/uploads/1/3/1/4/131438873/87078.pdf
    • http://plexusbetterliving.com/uploads/1/3/0/7/130776222/kagalijoxenumu_zupumelowekofuf_detizi_romavubaxo.pdf
    • http://readwritenowga.com/uploads/1/3/1/4/131452904/vuzujemuzex-pojigatepeme.pdf
    • http://makingpatina.com/uploads/1/3/0/6/130603943/8480610.pdf
    • http://thegenesishomestead.com/uploads/1/3/0/7/130775062/03cc8306b264d.pdf
    • http://josephpvusich.com/uploads/1/3/0/7/130739626/nosot.pdf
    • http://adentaturkey.com/uploads/1/3/0/2/130288542/1660ce78.pdf
    • http://theprinteryshop.com/uploads/1/3/0/7/130776585/lotole.pdf
    • http://rennmark.com/uploads/1/3/0/3/130323624/e266daf27c.pdf
    • http://edgecleaning.ca/uploads/1/3/0/8/130814681/e8ef70.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006887.bin
de48687563e260a7e0385dabddcd27ead7813ca573d86a95ff51c4857fb64063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 7568 bytes
font_01_sfnt_off00008649.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8649 2652 bytes

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