Malicious PDF — malware analysis report

Static analysis result for SHA-256 9807b6720f832112…

MALICIOUS

PDF

74.8 KB Created: 2021-03-10 01:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: df721259331a209fcd177f56c0ef453f SHA-1: 88d780db8994cbff135d92d2425f373764ce8fa5 SHA-256: 9807b6720f832112e59163c790eed27fde03e3c29624377ce343cfb0035ebaeb
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with a notable one pointing to 'http://doordash.fun/pewejorofaja0g4.pdf', suggesting a link farm or redirection to malicious content. The PDF's structure and embedded URIs indicate it is designed to trick users into visiting potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=cadenas+redes+y+pir%25C3%25A1mides+alimenticias+pdf PDF link annotation
    • http://doordash.fun/pewejorofaja0g4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_6015799c323ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_601887c6aabd9.pdfIn PDF document text
    • https://kesuvovim.weebly.com/uploads/1/3/5/3/135317554/pokivebazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_5fe80b1656c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453532/normal_5fd710c0571e9.pdfIn PDF document text
    • https://gijepunudadolow.weebly.com/uploads/1/3/4/4/134497403/7372153.pdfIn PDF document text
    • https://vabinori.weebly.com/uploads/1/3/4/3/134348027/9460930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_6044f8623d75e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_60180759c1ba1.pdfIn PDF document text
    • https://kopiwuzurori.weebly.com/uploads/1/3/1/3/131398237/5928a9db.pdfIn PDF document text
    • http://brandframeb.com/905732334kiic6.pdfIn PDF document text
    • http://haifaiv.ru/craftguide_mod_1._6_4wlndr.pdfIn PDF document text
    • https://kujopupij.weebly.com/uploads/1/3/0/7/130740053/6851478.pdfIn PDF document text
    • http://huaweistoreukr.xyz/89088769046npsyb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_16666e77e53b45e1959ea903cadec12a.pdf?index=trueIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_5f92136fa2044407b1f2bef110f1b102.pdf?index=trueIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_f1b5b705d4a649bdbcb4600a672ca2c0.pdf?index=trueIn 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_off0000e3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AE 5544 bytes
SHA-256: c049169cf62ba7e61c166420ff2072fa41304bebc7d0d4e18d414ed26f5a5cea
font_01_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 11796 bytes
SHA-256: 98daa984a81a0d366ff2da6ffab477b93f3032851f8fd53064ff798549ea897c

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