Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9911fed2b95b5a…

MALICIOUS

PDF

37.2 KB Created: 2020-06-05 22:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: e02c1bec70be3fab1fb083b3bb580114 SHA-1: 8fa2b1712e035da52e36f64bb7180a2f39588cc2 SHA-256: 7b9911fed2b95b5a66455b4204a4fe4aa8e46ebfbed0368d445de0bf06289a26
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous external URLs embedded within its body. The ML classifier strongly flagged this sample as malicious, and the PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or redirect users to potentially harmful content. While no scripts were extracted, the presence of many external links points towards a phishing or content-luring attack vector.

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://np-3.com/uploads/1/3/0/9/130969987/130969987.html#level+5+aetherial+wheel+stand PDF link annotation
    • http://mta-sts.swilliamsphotos.com/uploads/1/3/0/7/130739789/61cf6cf4254e2.pdfIn PDF document text
    • http://amandacrosby.com/uploads/1/3/0/7/130776889/277000.pdfIn PDF document text
    • http://thepathofservice.org/uploads/1/3/0/5/130540493/319619494b0.pdfIn PDF document text
    • http://1650lakecook.com/uploads/1/3/0/4/130436163/9859890.pdfIn PDF document text
    • http://seatsandracks.com/uploads/1/3/1/4/131454549/3519490.pdfIn PDF document text
    • http://southernforestshoney.com/uploads/1/3/0/9/130969920/9851797.pdfIn PDF document text
    • http://iezrareresources.com/uploads/1/3/0/7/130739802/3944119.pdfIn PDF document text
    • http://np-3.com/uploads/1/3/0/9/130969987/terms.htmlIn PDF document text
    • http://np-3.com/uploads/1/3/0/9/130969987/dmca.htmlIn PDF document text
    • http://np-3.com/uploads/1/3/0/9/130969987/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gebumubub.files.wordpress.com/2020/06/sisokisusokado.pdfIn PDF document text
    • https://gamudafesawa666056143.files.wordpress.com/2020/06/luvujatena.pdfIn PDF document text
    • https://bujiwilofife.files.wordpress.com/2020/06/vagowekamutut.pdfIn PDF document text
    • https://xovexin.files.wordpress.com/2020/06/42773868622.pdfIn PDF document text
    • https://vaxatuwo.files.wordpress.com/2020/06/xikikuvimewoxumebitaxafuw.pdfIn PDF document text
    • https://nemopopa.files.wordpress.com/2020/06/41871775796.pdfIn PDF document text
    • https://mowatupuj.files.wordpress.com/2020/06/9378289888.pdfIn PDF document text
    • https://vurizuzuni.files.wordpress.com/2020/06/sifatunerilokin.pdfIn PDF document text
    • https://berilin.files.wordpress.com/2020/06/fevenufabivibubipaguro.pdfIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 10520 bytes
SHA-256: 784160ef85e1d6685ba459018757bb25e6be92d6420bcba4b1c5149f7ce82ded

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