Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0474aa74382777…

MALICIOUS

PDF

50.9 KB Created: 2020-04-11 23:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-12-25
MD5: 9921280009ef266bfe27053a1cc00203 SHA-1: 1fffb6303ca1c86495d70804ea87ce6067d394c7 SHA-256: 3e0474aa74382777c328aa9440a402335177f7d788ff847126925c7b6d292534
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially obfuscated, includes a URL that is also listed in the extracted URLs. This suggests the primary function of this PDF is to redirect users to potentially malicious content hosted on these external sites, likely as part of a link farm or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://marmarworld.com/uploads/1/3/0/3/130379285/130379285.html#ecuacion+quimica+de+combustion+incompleta PDF link annotation
    • http://surebuildlandscaping.com/uploads/1/3/1/4/131437236/dbcfe655.pdfIn PDF document text
    • http://maceratateatro.it/uploads/1/3/0/7/130775632/7010115.pdfIn PDF document text
    • http://dominicspizzeria.net/uploads/1/3/0/6/130604042/nimafami-midukamalividaj-movitirenamon.pdfIn PDF document text
    • http://baubles-n-bling4u.com/uploads/1/3/0/5/130544386/7618342.pdfIn PDF document text
    • http://dmvengineering.net/uploads/1/3/0/7/130740389/lixemo.pdfIn PDF document text
    • http://wilkinsoncarpentry.com/uploads/1/3/0/7/130739923/witavimexakeputopusi.pdfIn PDF document text
    • http://johnhinckley.net/uploads/1/3/0/9/130969577/sirakilez.pdfIn PDF document text
    • http://jeffpontillo.com/uploads/1/3/0/6/130639976/wepijadokuwinujobi.pdfIn PDF document text
    • http://bellasimple.com/uploads/1/3/0/5/130588188/8c5dde5e6059.pdfIn PDF document text
    • http://allaccessbuildingservices.com/uploads/1/3/1/4/131437130/aaae14f96ba.pdfIn PDF document text
    • http://mrigini.com/uploads/1/3/0/7/130775800/zeramitomikeva.pdfIn PDF document text
    • http://maisonconcrete.com/uploads/1/3/0/4/130483418/4882495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000939f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x939F 9036 bytes
SHA-256: 3d0e456fe0e33ce860ed0a45c47764a17f8aa55ed46136491f1fdf043b3df2d1
font_01_sfnt_off0000b402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB402 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea