Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ad7730cf5191a9…

MALICIOUS

PDF

38.5 KB Created: 2020-06-01 18:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c47007b102a25727931619af0232294e SHA-1: 4398981393e5ed71fb9a02986e824b7877d77448 SHA-256: 17ad7730cf5191a92b1fa937992229419813d18dad0984bb05cb6eb06188f82a
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external websites, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL, http://marmarworld.com/uploads/1/3/0/5/130589241/130589241.html#%25C3%25B8reringstr%25C3%25A6+til+piger, and many others point to potentially malicious content or SEO spam pages. No scripts were extracted, but the structure suggests a malicious document designed to redirect users to a network of sites.

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://marmarworld.com/uploads/1/3/0/5/130589241/130589241.html#%25C3%25B8reringstr%25C3%25A6+til+piger
    • http://federacioncolombia.com/uploads/1/3/0/8/130813357/9859055.pdf
    • http://dentasites.org/uploads/1/3/0/5/130551058/guxajo-nekejulojedi-lifetawuzenit.pdf
    • http://blackheartsandbarbells.co.uk/uploads/1/3/0/2/130272636/sudiwevisawuju.pdf
    • http://afteralltheseyearsbook.com/uploads/1/3/0/5/130540583/riniterafuk.pdf
    • http://hostmaster.magmum.lt/uploads/1/3/0/4/130435547/1dd7262.pdf
    • http://marmarworld.com/uploads/1/3/0/5/130589241/terms.html
    • http://marmarworld.com/uploads/1/3/0/5/130589241/dmca.html
    • http://marmarworld.com/uploads/1/3/0/5/130589241/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vemupuki.files.wordpress.com/2020/05/55254565432.pdf
    • https://kuramajibi.files.wordpress.com/2020/05/63900902513.pdf
    • https://fojegosuke.files.wordpress.com/2020/05/4012752115.pdf
    • https://wowewuso.files.wordpress.com/2020/05/20838308187.pdf
    • https://vojetiz.files.wordpress.com/2020/05/31281179945.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065fb.bin
0aab02c237c4b5e6a7bea8e8901ca78c531f09173fcb5399c870d91d95490a76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FB 14312 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.