Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90eff7953fee6f9…

MALICIOUS

PDF

33.3 KB Created: 2020-04-28 15:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 74d1ad5a3956586ad8a0bade143085c4 SHA-1: 391af54d94e392e105f4e28c35c38c5f1f4b00fc SHA-256: d90eff7953fee6f9b2711c41dc006a0a4b34494e764e7a82bbb2faff425c2b05
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The document body contains fragmented text related to 'Vshare ios 2019' and the authoring application 'wkhtmltopdf', but does not provide a clear lure. No scripts were extracted from this sample. The primary attack pattern involves directing users to external resources, potentially for SEO manipulation or to serve further malicious content.

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://foothillsbiblefellowship.com/uploads/1/3/1/3/131379564/131379564.html#vshare+ios++2019
    • http://mobileinstallationgroup.com/uploads/1/3/0/6/130603743/3524800.pdf
    • http://decisionsdeterminedestiny.com/uploads/1/3/1/4/131407965/9662371.pdf
    • http://choppedsa.com/uploads/1/3/0/2/130270967/revupunajowap-sidemazoke-lusiwoxilobijut-musenojojugep.pdf
    • http://lifeforceeco.com/uploads/1/3/0/5/130590244/negatonepux.pdf
    • http://krygamusic.com/uploads/1/3/1/4/131406687/jirenedofikozuw.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_off00005aeb.bin
fbe92ac3908e050c010fca03355b3808d9a955a17f055a2cf1c4bbbb13cb669b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEB 7972 bytes

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