Malicious PDF — malware analysis report

Static analysis result for SHA-256 051dd7942f39e040…

MALICIOUS

PDF

51.8 KB Created: 2020-06-06 14:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 2c2b695bb10816046b5e092d120f27a4 SHA-1: 41d85837ef40e37b2489c94c6705faad267f4dd9 SHA-256: 051dd7942f39e04095dd1edcc676eefb1dc3df54eaca09159c421aabeb9bc268
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on various domains. This pattern is indicative of a link farm or a mechanism to distribute malicious content across multiple sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is not benign. No scripts were extracted, but the extensive linking suggests a potential for redirecting users to exploit kits or phishing pages.

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://onlinelighthousestlouis.com/uploads/1/3/0/5/130551015/130551015.html#town+hall+11+base PDF link annotation
    • http://outex.lv/uploads/1/3/0/3/130323675/4180154.pdfIn PDF document text
    • http://savagesquaw.com/uploads/1/3/1/4/131454216/928253.pdfIn PDF document text
    • http://simpleetravel.com/uploads/1/3/0/2/130272862/4deb5e.pdfIn PDF document text
    • http://c2-sides.com/uploads/1/3/1/4/131483112/fikezi-nedomikapixas-fapelisad.pdfIn PDF document text
    • http://steeltec.us/uploads/1/3/0/2/130291491/b64c74.pdfIn PDF document text
    • http://betteroffice.org/uploads/1/3/0/7/130775318/fugoxokomowe-muzug-pukerexe.pdfIn PDF document text
    • http://74-123-75-186.mgwnet.com/uploads/1/3/1/3/131383614/tomuzimijasi-dejifot-xejadosadikagix-rubavig.pdfIn PDF document text
    • http://onlinelighthousestlouis.com/uploads/1/3/0/5/130551015/terms.htmlIn PDF document text
    • http://onlinelighthousestlouis.com/uploads/1/3/0/5/130551015/dmca.htmlIn PDF document text
    • http://onlinelighthousestlouis.com/uploads/1/3/0/5/130551015/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tazomaru.files.wordpress.com/2020/06/68291119199.pdfIn PDF document text
    • https://kegivisoxibu.files.wordpress.com/2020/06/febigitofidatula.pdfIn PDF document text
    • https://vutazuxevez.files.wordpress.com/2020/06/bikubode.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD5 3188 bytes
SHA-256: 6b7deebed23bc30b61dfa3eb5766a24ba9453c374dd54a9ce62f83811e03e24a
font_01_sfnt_off000088dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DC 10736 bytes
SHA-256: 054ffd011b715526f9968854acec3118d80a4835be2706e6bb020deae7dee73b
font_02_sfnt_off0000adbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADBD 16232 bytes
SHA-256: 95bdf1e51c91a347532f4b179d39af09e29107d578526feb1362f61cac632cad

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