Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4d07d2fcf98d57…

MALICIOUS

PDF

38.2 KB Created: 2020-05-30 21:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77e7eadd0538f7889b489b2959a39a6f SHA-1: 214743ad4d6de12fab7b5c44235853b6a7aa5629 SHA-256: 5f4d07d2fcf98d5797ab03d81d551b5aaaca4db6973b28f6baa5c62274e13f7e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various PDF files hosted on different domains, reinforcing the link farm pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://lafayetteho.net/uploads/1/3/0/4/130436339/130436339.html#th%25C3%25A1m+t%25E1%25BB%25AD+ngo%25E1%25BA%25A1i+c%25E1%25BA%25A3m+ph%25E1%25BA%25A7n+3
    • http://thegoodstream.com/uploads/1/3/0/6/130605238/7641863.pdf
    • http://142ellert.com/uploads/1/3/1/4/131482886/kobiz.pdf
    • http://secret-estate.com/uploads/1/3/0/6/130605347/f6b940939ad272b.pdf
    • http://ilmcorporation.com/uploads/1/3/0/4/130476619/dojojozov.pdf
    • http://digitalasean.com/uploads/1/3/1/4/131406698/babojofatelagi-megowosurifude.pdf
    • http://jpgirls.us/uploads/1/3/0/6/130605237/nudulazumopud_dolav_susoj.pdf
    • http://davidson.reportcoronavirussymptoms.com/uploads/1/3/0/6/130620968/b2c12b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off00005c5c.bin
5d54784030dfae6541d6adc82851896612d9eec86284725a2ba9071eb5691b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5C 22596 bytes

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