Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeffa003ce54b430…

MALICIOUS

PDF

70.1 KB Created: 2021-02-11 17:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 83d9a3b3ebad5d44bd40ece8397c281d SHA-1: ace7b69c4177d5fe6ba29a86af4d9939e891faa6 SHA-256: eeffa003ce54b430aec2cdc1f5a0b95f72af1d6611b07df6f21ce1154be1c840
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of an external URI indicates an attempt to redirect the user to a potentially harmful website. This suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://jacksth.ru/wix?keyword=te+quiero+mi+amor+poema PDF link annotation
    • http://legendarycraft.ru/vurumazisulobukoxipusent0inj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366958/normal_5febd951a15f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408482/normal_5ff2db5ddd705.pdfIn PDF document text
    • http://wegansit.space/633473684428pbbm.pdfIn PDF document text
    • https://cdn.sqhk.co/xidodaxu/eQjakgf/dupatatapivi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373755/normal_5fcaebd71d363.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/2HhcKgg/brawl_stars_opening_1000_mega_boxes.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/iXLd6O1/calendar_to_do_list_template_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_6016de6615089.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/midipes/farmacos_anestesia_geral.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/sunuteganurit.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/tawoxefus.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/drop_down_menu_html_css_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/venice_map.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/child_care_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/29442239831.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/93747632247.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 4828 bytes
SHA-256: 0e42ee86850aa26b40ed51926621976d7fb0a65f40a3a1a372dca56215e32763
font_01_sfnt_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 11000 bytes
SHA-256: 68bafc16230e18ca1fa24ea52646dd15d7beee4182ebdbcbbb8fffb71a02f494

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