Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec493c3b671596a…

MALICIOUS

PDF

33.0 KB Created: 2020-06-06 19:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 66cd4758f677bb5242fdf3e94144da8d SHA-1: 12aaefce69a1250e6e07a8d3c1cd6636dd95ed21 SHA-256: 1ec493c3b671596a0bdaf0413fc0afe1c65a84d52f77e444e8f71ab8c7fe447e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains references to 'Nuance converter professional 7 seri' and the wkhtmltopdf application, suggesting a potential lure related to software or document conversion. The primary attack pattern involves directing users to a multitude of external PDF resources, likely for SEO poisoning or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://hostmaster.theoxfordpianogroup.org.uk/uploads/1/3/0/8/130874591/130874591.html#nuance+converter+professional+7+seri PDF link annotation
    • http://powertrip-comics-and-ephemera.com/uploads/1/3/0/2/130289636/a0ce347a4c5a.pdfIn PDF document text
    • http://hostmaster.whitstablemusicsociety.org.uk/uploads/1/3/0/5/130588732/najaji.pdfIn PDF document text
    • http://hostmaster.baffinisland.ca/uploads/1/3/0/5/130588763/815788.pdfIn PDF document text
    • http://twofriendsgames.com/uploads/1/3/0/3/130379597/magalevene_zurokuginit_lejufanogevo_jamorafepesafa.pdfIn PDF document text
    • http://teamcch.com/uploads/1/3/1/4/131407021/nojalut.pdfIn PDF document text
    • http://tripledsdisposalservices.com/uploads/1/3/0/5/130543264/5394164.pdfIn PDF document text
    • http://theplansihave.com/uploads/1/3/0/5/130539129/3970cca40.pdfIn PDF document text
    • http://yuthdaytours.org/uploads/1/3/0/7/130775776/raxijagawobes.pdfIn PDF document text
    • http://74-123-73-168.mgwnet.com/uploads/1/3/0/7/130739474/4101287.pdfIn PDF document text
    • http://terryhonoreconstructionco.com/uploads/1/3/0/6/130604617/pesebeto.pdfIn PDF document text
    • http://hostmaster.theoxfordpianogroup.org.uk/uploads/1/3/0/8/130874591/terms.htmlIn PDF document text
    • http://hostmaster.theoxfordpianogroup.org.uk/uploads/1/3/0/8/130874591/dmca.htmlIn PDF document text
    • http://hostmaster.theoxfordpianogroup.org.uk/uploads/1/3/0/8/130874591/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://takovime.files.wordpress.com/2020/06/gogizerejogigi.pdfIn PDF document text
    • https://xanalusuken.files.wordpress.com/2020/06/34598267209.pdfIn PDF document text
    • https://pogunuji.files.wordpress.com/2020/06/xajubenujujuno.pdfIn PDF document text
    • https://dopidubut.files.wordpress.com/2020/06/zurawodurisozusuxud.pdfIn PDF document text
    • https://pixefetono438033228.files.wordpress.com/2020/06/92922769013.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000528f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x528F 11076 bytes
SHA-256: 8d3489a9d71edccddd393f95d263e8f2d592167fabf9fed994d89198d209cf22

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