Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb25089e536219a…

MALICIOUS

PDF

80.3 KB Created: 2021-03-17 13:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c713b212e2a2c8faa41e0e25f73d0a9e SHA-1: 9693708eaa48e2ee0b36691a9015e68e1bdf924b SHA-256: deb25089e536219a9bffce7a21d6f8ba449de6c3563b79845b86b0cc27c64310
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://kuzutuzo.ru/strik?utm_term=cuando+es+mas+contagioso+un+paciente+con+covid PDF link annotation
    • http://organicnu.info/muvofigiturogijilq2lx7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460972/normal_602f2668e8c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_603e3541bc17b.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/aicWDhc/3185845042.pdfIn PDF document text
    • https://cdn.sqhk.co/manoxixo/WOgfjw5/34371889391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5ff617447a94a.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/fgfhjhb/taxiluvulojatevi.pdfIn PDF document text
    • http://vidclips.design/what_does_a_pr_and_communications_manager_domv6m6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_603ff2e984cd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495976/normal_5fd0b18b65a45.pdfIn PDF document text
    • http://ctuxuu.com/que_tipos_de_grupos_indigenas_hay_en_mexicokoxy0.pdfIn PDF document text
    • http://baykamif.space/converter_para_dwg_autocad_2019ac28i.pdfIn PDF document text
    • https://cdn.sqhk.co/gepaxulunan/jfyhjjg/earthquake_los_angeles_today_just_now.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/v9idEt2/jewagaxolivugebagasanuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498842/normal_6010a91060b42.pdfIn PDF document text
    • http://itawomen.fun/17385339668ck8l5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_6022f70eda205.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/povelenavuviw/sosevebuxot.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/97297591405.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/75206977531.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/magic_chef_refrigerator_fan_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/convert_excel_sheet_into.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2C 5228 bytes
SHA-256: 90c266adc485f995b73fd6fc1d4d2ebc03b38229eaee4b78d1049be334f036ea
font_01_sfnt_off00010cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 11844 bytes
SHA-256: 71fe4e12c7828ccc10a2dd97a054ffb443b4d884b30560316d9f2bc2044bd25b

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