Malicious PDF — malware analysis report

Static analysis result for SHA-256 7884f31bbd5849d9…

MALICIOUS

PDF

43.3 KB Created: 2020-06-04 01:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: c3eee95f17f7267b9a52d11ae91e468d SHA-1: 64047f653c8fdb2b2fa7bad74f034e010de1271f SHA-256: 7884f31bbd5849d98b693283d70ad1258be6f39876014a9f78125b157d0e71b7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The primary purpose appears to be directing users to a network of linked PDF files, likely for SEO spam or to distribute further malicious content.

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://mercadofresco.net/uploads/1/3/0/2/130289272/130289272.html#flower+coloring+pages+for+kids PDF link annotation
    • http://drlove.blog/uploads/1/3/1/6/131637248/tetiveju.pdfIn PDF document text
    • http://thcateringllc.com/uploads/1/3/0/6/130620996/0c290806c.pdfIn PDF document text
    • http://pbrr.ca/uploads/1/3/1/6/131606339/zijotoz.pdfIn PDF document text
    • http://lwmdtest.com/uploads/1/3/1/4/131437523/6266629.pdfIn PDF document text
    • http://kauss-tacoma-trd-realtor.com/uploads/1/3/0/6/130604768/a1c0c.pdfIn PDF document text
    • http://bowriverflyfishguide.com/uploads/1/3/1/4/131438874/a404a.pdfIn PDF document text
    • http://cartledgecleaning.com/uploads/1/3/0/3/130323814/545940.pdfIn PDF document text
    • http://jenniferji.com/uploads/1/3/0/2/130271114/merawenu.pdfIn PDF document text
    • http://thelincolnimpscunthorpe.com/uploads/1/3/1/4/131454373/tizomoxexe.pdfIn PDF document text
    • http://barrelsborrowed.com/uploads/1/3/1/3/131398059/13ccf141060.pdfIn PDF document text
    • http://pamelajohnson.net/uploads/1/3/1/0/131069759/a5d42.pdfIn PDF document text
    • http://harmonscustommadegrills.com/uploads/1/3/1/1/131164506/7897160.pdfIn PDF document text
    • http://lombepropertyconsulting.com/uploads/1/3/0/9/130969259/6331564.pdfIn PDF document text
    • http://mercadofresco.net/uploads/1/3/0/2/130289272/terms.htmlIn PDF document text
    • http://mercadofresco.net/uploads/1/3/0/2/130289272/dmca.htmlIn PDF document text
    • http://mercadofresco.net/uploads/1/3/0/2/130289272/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://turabiza121509985.files.wordpress.com/2020/06/20291277540.pdfIn PDF document text
    • https://tukitifo.files.wordpress.com/2020/06/pelovuwogofalegawex.pdfIn PDF document text
    • https://wijevikase.files.wordpress.com/2020/06/19765851944.pdfIn PDF document text
    • https://ribodijexob.files.wordpress.com/2020/06/mazilufiwadajenoko.pdfIn PDF document text
    • https://losevinaz.files.wordpress.com/2020/06/4611080534.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 1

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_off00007d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7A 10372 bytes
SHA-256: eaa7e3e9ce4ffbb3fd34c8d63c77958b5697dbeb950d53005dbdb4115787d197

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