Malicious PDF — malware analysis report

Static analysis result for SHA-256 670341d5f2577eb5…

MALICIOUS

PDF

81.4 KB Created: 2021-05-11 19:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8ffc4538072c7ef62a0104ed1f290db SHA-1: 0ee3b8a7934e7690d6afa2548c4183bf43f54159 SHA-256: 670341d5f2577eb5183dc9af14d7c42f69c2902475af40b458163200d7230287
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 0.9993

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://gimoguvi.ru/strik?utm_term=hp+officejet+4630+ink+cartridge+failure PDF link annotation
    • https://cdn.sqhk.co/dofofigeniso/MihqUgc/bangla_natok_title_song.pdfIn PDF document text
    • http://antonio-ita.space/jijozamimufpp0k.pdfIn PDF document text
    • http://blockhcain.host/leredepabedude6slal.pdfIn PDF document text
    • http://zozitaze.mypressonline.com/99511357790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471275/normal_6007dc1c43aec.pdfIn PDF document text
    • http://vinnipoh.space/shimano_di2_charging_cable8yc4z.pdfIn PDF document text
    • http://vitrinachel.ru/accomplishment_report_for_teachers_introduction6kj4h.pdfIn PDF document text
    • http://organicsss.space/49476499736j6pcl.pdfIn PDF document text
    • http://kyukty68.xyz/epcot_centre_map0prnu.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/VrhehcH/83155772270.pdfIn PDF document text
    • http://legibovusapezo.mypressonline.com/14951593473.pdfIn PDF document text
    • http://yourcy.com/exhibition_stall_design_portfolioluzht.pdfIn PDF document text
    • http://yandex-dostav.ru/joguvaxet6krtd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485442/normal_601930b99fc29.pdfIn PDF document text
    • http://pogadai.xyz/zoxubezavm2j2o.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/catalogue_ni_tht.pdfIn PDF document text
    • http://return-0.com/what_religion_do_they_practice_in_greecegyr3x.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/how_to_export_autocad_to.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/nunigubod4h9ex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5fddbccaa3c5d.pdfIn PDF document text
    • http://shoes-storie.club/wuforuboxep291u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5fc9217d705d9.pdfIn PDF document text
    • http://securityverifiedservices.com/tartine_bread_book_freel58qp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_600e780b4b179.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fe3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 5796 bytes
SHA-256: 1bbec94abae30862f79a9ac9ca76a73b8a7a2b407188995561ddaf15447ae8e2
font_01_sfnt_off00011219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11219 11368 bytes
SHA-256: 866221315b384d9316ffd3bd93094380443f4179c7f0bebad2fb236864443b7b

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