Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca861ee64eafbdd0…

MALICIOUS

PDF

40.1 KB Created: 2020-05-19 07:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 55d1e3699801bcf8fa852e2f5580cdb7 SHA-1: 7030ea0f00a58bc6f26fc99b4d32cb8cd58a5d09 SHA-256: ca861ee64eafbdd02208de581a1ea65f58210439f815ddf24f5abeb07fe7f8d5
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to numerous PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text and embedded URLs, reinforcing the idea that the primary purpose is to redirect users to external content. No scripts were extracted, limiting the analysis of direct payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://icosmeticsshop.com/uploads/1/3/1/6/131636862/131636862.html#siglo+de+las+luces+pdf PDF link annotation
    • http://goldcrownh.com/uploads/1/3/0/5/130589288/tovum-fikeda-pinupedeboj.pdfIn PDF document text
    • http://v-aria.com/uploads/1/3/0/5/130588649/tirovizum.pdfIn PDF document text
    • http://freewayis.com/uploads/1/3/0/7/130776573/potetaxizebuweko.pdfIn PDF document text
    • http://arkvannoa.be/uploads/1/3/1/3/131379541/2777454.pdfIn PDF document text
    • http://robertpatrickplaywright.com/uploads/1/3/1/4/131438211/6a21a49a43b.pdfIn PDF document text
    • http://joeburritos.com/uploads/1/3/0/6/130621916/6394015.pdfIn PDF document text
    • http://rihgreetings.com/uploads/1/3/0/5/130589135/2690040.pdfIn PDF document text
    • http://milesdefensive.com/uploads/1/3/0/9/130969628/5968322.pdfIn PDF document text
    • http://carringtonrealty.net/uploads/1/3/1/3/131398544/7322163.pdfIn PDF document text
    • http://spacewithinorganizing.com/uploads/1/3/0/7/130775154/4407425f5e.pdfIn PDF document text
    • http://eapworksnewzealand.com/uploads/1/3/1/6/131606295/zikan.pdfIn PDF document text
    • http://lubbockpestcontrol.net/uploads/1/3/1/4/131453214/xedesinepi_nozarolojowalam.pdfIn PDF document text
    • http://iptvdatuga.site/uploads/1/3/0/5/130588850/6612366.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7106 11912 bytes
SHA-256: 4ac5098870bda3a9c1cd514ec1f9dd0305ab895290b9e4e17a65c91bb28840b3