Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e0edcb2c0ab3a6…

MALICIOUS

PDF

36.4 KB Created: 2020-05-21 22:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9ee044403e90aa9e298e42cfe6ffd8 SHA-1: 0e8fdbaf026e33d590fc5cc5ad24dd17830c78db SHA-256: 89e0edcb2c0ab3a6ce24d9ccf121e91ad8b91d3bd2ab20278620a554a962dd5e
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, suggesting an attempt to distribute malicious content or engage in SEO poisoning. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://4pe.undesirable.us/uploads/1/3/0/3/130312926/130312926.html#nes+app+android
    • http://adventuredanang.com/uploads/1/3/0/3/130313038/katuta_jixepefigipexu_vovifurukero_roximilek.pdf
    • http://tenantrep2017.com/uploads/1/3/0/5/130588733/5299643.pdf
    • http://keepcsamaphysiciansociety.com/uploads/1/3/0/4/130435741/vugewizasanujeduz.pdf
    • http://padikost.com/uploads/1/3/0/3/130313700/pifuwed_pidis.pdf
    • http://learnmymoney.net/uploads/1/3/0/7/130775013/d56ee.pdf
    • http://faithblocks.com/uploads/1/3/0/6/130621959/futokuf.pdf
    • http://westlabconsultants.net/uploads/1/3/0/6/130620701/zugotipuwerulos.pdf
    • http://terimorning.com/uploads/1/3/0/8/130873912/0ef2f.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_off000063cd.bin
84ccd95abcbeb0791a3e9bf90bd87cc9b6601b9a9597699d75bda17c167cf006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CD 10376 bytes

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