Malicious PDF — malware analysis report

Static analysis result for SHA-256 f771e4987e1e3ed8…

MALICIOUS

PDF

30.7 KB Created: 2020-03-20 11:00:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0111bb0495775aea61d9138c1a4d19a0 SHA-1: ddd10cfa1123c4558bc058d66bae97ebc37bc63e SHA-256: f771e4987e1e3ed86f38ab92a33bf750905b29135fd43fba8644da6beba31d45
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body and extracted URLs suggest a link farm designed to direct users to numerous other PDF files hosted across various domains. This pattern is often used for SEO manipulation or to distribute further malicious content, though no specific payload execution was directly observed in this sample.

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://trailsandpavement.com/uploads/1/3/0/7/130775589/130775589.html#the+jam+jar+whitley+bay
    • http://stjohncic.org/uploads/1/3/0/4/130479312/6295519458a24a.pdf
    • http://www.cwworkshops.com/uploads/1/3/0/6/130604980/9276967.pdf
    • http://luciasuite.com/uploads/1/3/0/5/130545043/bojomimujigum.pdf
    • http://ybfa.co.uk/uploads/1/3/0/9/130969946/1313063.pdf
    • http://mnbaby590988.org/uploads/1/3/0/8/130814711/bf44ef1685a58.pdf
    • http://thebloodyrook.net/uploads/1/3/0/2/130270956/lekomovukakepe.pdf
    • http://67-37-101-213.splcwa.org/uploads/1/3/0/5/130551611/memaxer.pdf
    • http://euphoricencounters.org/uploads/1/3/0/5/130539797/negoxis.pdf
    • http://millikenconsults.com/uploads/1/3/0/8/130814531/doxonedisaripitar.pdf
    • http://kimswansonwellness.com/uploads/1/3/0/2/130272587/339211ab562ce.pdf
    • http://www.magicdragonfacepainting.com/uploads/1/3/0/8/130813528/9234403.pdf
    • http://www.pampiersonartist.com/uploads/1/3/0/7/130775211/pikuvopekuv.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_off00005251.bin
68711ba2d7091f8a62de0221fd70c608617a8359a5a27bc8f98ecc1119aa71af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5251 7168 bytes

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