Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a13ae68349d31d6…

MALICIOUS

PDF

82.6 KB Created: 2021-03-25 06:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 76d7cba19cc0dd31b6e2738de1e78f4e SHA-1: e95ec14afbb1720e08f0449c621ab20c389f4fb1 SHA-256: 1a13ae68349d31d6d614f022c41de424e789ce6d2f82e81d8a8bf539cf29a432
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=watch+the+joker+movie+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452152/normal_5fcf8103b63af.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/generos_periodisticos_resumen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366324/normal_5fe1e9bf1d83f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_6019ca6290215.pdfIn PDF document text
    • http://cheeronthemove.store/goridm0cvs.pdfIn PDF document text
    • http://hellochildren.online/35396324940l04q4.pdfIn PDF document text
    • http://pedrons.space/splash_mountain_disney_world_death6nx9h.pdfIn PDF document text
    • http://prognoz-football.club/moratewowegejikgfmlw.pdfIn PDF document text
    • http://copyrightviolationcenters.com/8_codewords_answers3f6zr.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/que_son_las_tecnicas_de_redaccionx2vv5.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/charlie_and_the_chocolate_factory_musical_veruca_death.pdfIn PDF document text
    • http://abanca-electronica.com/difference_between_epson_v550_and_v600_scanner09943.pdfIn PDF document text
    • http://trenolgia.buzz/faluburasemsnkt9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fdbc6d375021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jazopizebe.atwebpages.com/enfermedades_geneticas_mas_comunes_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/beats_solo_3_wireless_how_to_work.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/56510227064.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 4860 bytes
SHA-256: d1fd6978b3650fd9439bf7d5e392e3aeed74fe6408ffe62a85f28118ebcd9fef
font_01_sfnt_off00010b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B69 10424 bytes
SHA-256: cc78ed28e374c5b294057dca6ba793d5bc11a9a508822b22e6ab692b1a97a492
font_02_sfnt_off00012eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c