Malicious PDF — malware analysis report

Static analysis result for SHA-256 190b26f1fd96bb81…

MALICIOUS

PDF

42.4 KB Created: 2020-03-07 13:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6a6e4204de98593584d2d2280b85fbca SHA-1: 38147faa297381b59e25a91f5a03b96ee24e94b3 SHA-256: 190b26f1fd96bb810be64852ef6b467c1ac8e89de8fb3f256fd17cead0d60429
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://jennamccabe.com/uploads/1/3/0/7/130776385/130776385.html#difference+comparative+advantage+and+absolute+advantage
    • http://sylvialeconsulting.com/uploads/1/3/0/6/130620635/foxikozixepem.pdf
    • http://jamesroutledge.com/uploads/1/3/0/5/130539279/dutureje.pdf
    • http://mta-sts.mail.usaexpressions.com/uploads/1/3/0/7/130775361/3609690.pdf
    • http://thesoundofthecoldwar.com/uploads/1/3/0/3/130323488/7c157e.pdf
    • http://mayoancestors.ie/uploads/1/3/0/4/130476632/xaxud.pdf
    • http://yasr.com/uploads/1/3/0/6/130620519/7861865.pdf
    • http://www.newmarkethanaiohana.com/uploads/1/3/0/2/130289541/nojajabewoni.pdf
    • http://unbanporn.com/uploads/1/3/0/5/130546543/6863399.pdf
    • http://artofburkinafaso.com/uploads/1/3/0/6/130620720/63dbbdd61a0e43.pdf
    • http://mta-sts.heathertuach.com/uploads/1/3/0/6/130620317/5297876.pdf
    • http://www.trappedinthetrade.com/uploads/1/3/0/4/130436439/jetek.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_off0000751a.bin
79bcb554e0deb8293afa6345acaa231f1ab21c8650ba7ab51ef840e7d282de66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751A 7572 bytes
font_01_sfnt_off000092ca.bin
87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92CA 2596 bytes

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