Malicious PDF — malware analysis report

Static analysis result for SHA-256 06209eb30cf962dc…

MALICIOUS

PDF

56.8 KB Created: 2020-04-10 22:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 60256c1a820990a39fb14c8a2d4f5c19 SHA-1: 940af2eb0293f956b95b73b27ceb181cba9e7907 SHA-256: 06209eb30cf962dcf68a91336f0b86c0cf1c519f0ce61cc719468fb1364186ba
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary link points to a page with the title 'Que son los tratamientos termicos', suggesting a potential lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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://adsl-63-204-18-33.benefitplans.org/uploads/1/3/0/6/130604006/130604006.html#que+son+los+tratamientos+termicos
    • http://cbdforbullys.com/uploads/1/3/0/2/130291499/09e12c2.pdf
    • http://passionclothingcompany.com/uploads/1/3/1/4/131453194/panal-surofa.pdf
    • http://palslive.com/uploads/1/3/0/2/130291499/dalod.pdf
    • http://whosnextbarberstudio.com/uploads/1/3/1/4/131406613/1965196.pdf
    • http://samesource.org/uploads/1/3/1/3/131378930/913fe1f9646.pdf
    • http://distinctsitedesign.com/uploads/1/3/1/4/131407029/8417762.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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a91b.bin
bdd50acae29e81bee12c53d9da44b326b66fc4ee803a4280548f368bfcbb78a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA91B 9228 bytes
font_01_sfnt_off0000ca51.bin
0fe8ec2c4124f2bc52516b95b215b9fbb8e6a78b279c2d1dcb2a90cb97c72e3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA51 3112 bytes

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