Malicious PDF — malware analysis report

Static analysis result for SHA-256 35afc51ffcd45e50…

MALICIOUS

PDF

42.1 KB Created: 2020-06-15 23:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa767f6338c7695d5ceade8bb83ec657 SHA-1: a13c3455b980b093ad1ea7046d0554c210d7d7d3 SHA-256: 35afc51ffcd45e508010b5f86bd920e81a827628e2276ed535e49fbcc35351b2
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 to various domains, many of which appear to be part of a link farm designed for SEO manipulation. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a network of these SEO-generated PDF files, likely as a distribution or redirection mechanism for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://premierife.com/uploads/1/3/0/3/130313193/130313193.html#margaret+river+restaurant+guide
    • http://productmgr.ninja/uploads/1/3/0/5/130589132/f72511e863e5.pdf
    • http://aleccosher.com/uploads/1/3/0/2/130289224/550bb828.pdf
    • http://electricbeachbronzingsalon.com/uploads/1/3/0/7/130775376/8698a21341.pdf
    • http://theanxietyonline.com/uploads/1/3/1/3/131398259/loxuwafupiji.pdf
    • http://m.carolinamountainreefs.com/uploads/1/3/0/5/130588813/pepozuvobu-ravimebexusituj-jukedaxuv.pdf
    • http://ecohomevictoria.com/uploads/1/3/0/8/130813652/vulimizapazez.pdf
    • http://mirandamcasting.com/uploads/1/3/0/3/130379523/90b117a49c5a4.pdf
    • http://indianahomeloanprograms.com/uploads/1/3/0/7/130776063/naxora.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_off00007755.bin
0dc635c2ebaa47402b52063f8c3319d072e9115658451cc4e4cb1433ba31a5ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7755 11272 bytes

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