Malicious PDF — malware analysis report

Static analysis result for SHA-256 365f0cecdeef20d9…

MALICIOUS

PDF

37.3 KB Created: 2020-04-03 16:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8c4dd85b1f284596f80612bfd9c1ac2f SHA-1: 925f3cf4f5b377172887d53fb2c916db917df6b6 SHA-256: 365f0cecdeef20d99cc81b6fb81ffbfdf2dae8e7ffbef5bed917771aee23ddc0
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO poisoning or to redirect users to malicious content. The PDF_SEO_LINK_FARM heuristic specifically identifies this behavior. The embedded URLs are likely part of this link farm, aiming to drive traffic to potentially compromised or malicious sites.

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://georgecarrollmd.com/uploads/1/3/0/6/130639449/130639449.html#stocky+black+men
    • http://missouricards.com/uploads/1/3/1/0/131070727/519855.pdf
    • http://thekeytoheaven.com/uploads/1/3/0/3/130323158/tovetoxabe.pdf
    • http://capefearshoplocal.com/uploads/1/3/1/4/131438577/todovefipobose.pdf
    • http://lovelustboudoir.com/uploads/1/3/1/1/131164425/wevuxoduvu.pdf
    • http://dreamcatchergozo.com/uploads/1/3/1/3/131379384/d7160c48.pdf
    • http://nine31clothing.com/uploads/1/3/0/5/130588564/8662218.pdf
    • http://cyber-cy.org/uploads/1/3/1/3/131384660/8855394.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_off00006b6b.bin
bf8ff6e3b1d9a68e5cf5015e749f9478db12146d21fa358886be6e2ffd4f8347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6B 7660 bytes

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