Malicious PDF — malware analysis report

Static analysis result for SHA-256 583d87eb7ffed20c…

MALICIOUS

PDF

38.6 KB Created: 2020-06-10 10:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 50b86b7b680033cb6a9f0e92337b0cf0 SHA-1: ce7a11087c8ebb4afd7583c1d0c85f4e971debad SHA-256: 583d87eb7ffed20cfad0aadf5381d02522a412e3aad57c0ddbdf7cabae79b7ac
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 various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The document body contains text that appears to be metadata or obfuscated content, but the primary malicious activity is the mass of external URLs. No scripts were extracted from this sample.

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://wildridecoaching.com/uploads/1/3/1/4/131483128/131483128.html#tableau+section+cable+intensit%25C3%25A9 PDF link annotation
    • http://tmvix.net/uploads/1/3/0/6/130604197/xakupisetemobikizuf.pdfIn PDF document text
    • http://beyondcomparecarpet.com/uploads/1/3/0/6/130620337/matonakenikeg-gusal-jalebo.pdfIn PDF document text
    • http://hibelieve.com/uploads/1/3/0/7/130740462/misixodiwinabotakije.pdfIn PDF document text
    • http://ibizadjbooking.com/uploads/1/3/1/6/131637723/66f0cf4d21c9.pdfIn PDF document text
    • http://9f60ljd506.com/uploads/1/3/0/6/130620618/nozutewuvole.pdfIn PDF document text
    • http://mariaquintanapilling.com/uploads/1/3/1/1/131163863/2849193.pdfIn PDF document text
    • http://mail.nathan-artworks.net/uploads/1/3/1/4/131453784/xenolakaxuduzi.pdfIn PDF document text
    • http://naturalfairytale.net/uploads/1/3/1/4/131482808/df2cf.pdfIn PDF document text
    • http://thetwigwarehouse.com/uploads/1/3/1/6/131637850/f4ea5d510b948f7.pdfIn PDF document text
    • http://ashermainecoonkitten.com/uploads/1/3/1/4/131453539/furavebitogod.pdfIn PDF document text
    • http://shengdayule.chinasummercamp.org/uploads/1/3/0/7/130775405/2035296.pdfIn PDF document text
    • http://sunnyvalespikers.com/uploads/1/3/0/5/130551338/narepiki_foxasojekokabe_fufosokofo.pdfIn PDF document text
    • http://currypoint.net/uploads/1/3/0/6/130604249/fixigibukumunarab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fakadepe.files.wordpress.com/2020/06/lagepak.pdfIn PDF document text
    • https://rizifuto.files.wordpress.com/2020/06/bavawowominifatulokeju.pdfIn PDF document text
    • https://zifenopi.files.wordpress.com/2020/06/sozezezeninudelujen.pdfIn PDF document text
    • https://bipiwomej.files.wordpress.com/2020/06/fimirorow.pdfIn PDF document text
    • https://vefevomite.files.wordpress.com/2020/06/tanibezuserokesidu.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 6

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_off000064c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C6 12548 bytes
SHA-256: 8dc5a4a664ed69529e089cc6ae90060d9d480322f1f41f76c3787a2a725f4dac

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