Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6168f386f2f09b1…

MALICIOUS

PDF

37.4 KB Created: 2020-04-15 06:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 95cbcea9aaff1756eed7e826fc61f430 SHA-1: d7842513188472b87290aa3b8650bf5df9a2251e SHA-256: f6168f386f2f09b191a94695f318698e8676b03eb199eaeb8cd032d0c4facc57
62 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, indicating a large number of external links, many of which point to suspicious domains. One of the embedded URLs, 'http://sevencitiesfabrication.com/uploads/1/3/0/8/130814861/130814861.html#polarity+of+bonds+worksheet', is directly referenced in the document body, suggesting it is a primary lure. The presence of numerous similar URLs across different domains reinforces the pattern of a link farm designed to distribute malicious content or facilitate phishing. 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://sevencitiesfabrication.com/uploads/1/3/0/8/130814861/130814861.html#polarity+of+bonds+worksheet
    • http://rjfitnessokc.com/uploads/1/3/0/4/130483288/mifekoluzu.pdf
    • http://pereboomlaw.com/uploads/1/3/0/5/130589131/tutavuz_lonejipi_fewobusevudelon_romozokidi.pdf
    • http://jcpaiditall.com/uploads/1/3/0/6/130620320/45fa57f4c558bb.pdf
    • http://madcitycyber.org/uploads/1/3/0/7/130740462/pirozovufukawan.pdf
    • http://mycartilage.com/uploads/1/3/0/4/130483634/2368866.pdf
    • http://vrmotorspotproducts.com/uploads/1/3/1/1/131164278/maleluxa.pdf
    • http://djlove.info/uploads/1/3/0/2/130271049/bd0273306530444.pdf
    • http://peoplepleasers.org/uploads/1/3/0/3/130323511/ef7d0a7e33.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_off00006b70.bin
83e7a5b95dbd0ba5a4c9047a5deb21ecf996e69d152e8d28e1c965eb92643b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B70 7852 bytes

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