Malicious PDF — malware analysis report

Static analysis result for SHA-256 538efd40ed4da378…

MALICIOUS

PDF

45.6 KB Created: 2020-04-06 07:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ac64a1e6896fd7f387781d504af7ab16 SHA-1: f8ae51a62524d8c847049b925a8c49bab1772b03 SHA-256: 538efd40ed4da378b61d84f3bd4786821c4aa8245dcad5bd8cf17186f1fdfb1b
92 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The primary purpose appears to be directing users to a network of websites, potentially for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://millenniummath.com/uploads/1/3/1/4/131483440/131483440.html#significado+de+puerto+paralelo+en+informatica
    • http://eridanus-hb.com/uploads/1/3/0/8/130813975/3872975.pdf
    • http://globalmarketingnow.net/uploads/1/3/1/4/131407535/4118402.pdf
    • http://terribleideasband.com/uploads/1/3/0/5/130550664/manutivijonilejakebo.pdf
    • http://mswilliamsonline.com/uploads/1/3/0/6/130603979/2874136.pdf
    • http://nakomaplazaauto.com/uploads/1/3/0/4/130488773/jevoditokeworotad.pdf
    • http://watchesunlimitedaug.com/uploads/1/3/0/8/130873984/polinot.pdf
    • http://dyannafearon.com/uploads/1/3/0/4/130476294/vakejawumineko.pdf
    • http://timefreedomhustle.com/uploads/1/3/0/9/130969469/tisijepabanaku.pdf
    • http://lifeinsuranceagents.com/uploads/1/3/0/6/130620854/mobovi.pdf
    • http://brittanyjreid.com/uploads/1/3/0/4/130489564/775ab7309.pdf
    • http://thatthaiplace.com/uploads/1/3/0/8/130814290/4731705.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006816.bin
b224b45f30e39ddeed999493f203752342c207025cef20ed9ee17fac1080d8e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6816 8972 bytes
font_01_sfnt_off000088d1.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D1 2652 bytes
font_02_sfnt_off00009238.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9238 16036 bytes

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