Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fbb5c080ebd401…

MALICIOUS

PDF

78.0 KB Created: 2021-03-15 03:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ee27116609596a6d372c0dbe3c6d6d68 SHA-1: 50e73c9b274e78f74233c5963fb55a9c4f335883 SHA-256: e1fbb5c080ebd4014681c1e841544b7c7508183e4cc62b1409c1a9d7889f2361
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection infrastructure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://seumenha.ru/strik?utm_term=lugares+turisticos+de+morelia+michoacan+mexico PDF link annotation
    • http://1gusevshop.space/vibalonedos2gj7.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/ijtbjij/wing_chun_training_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_602616c240302.pdfIn PDF document text
    • http://vipmanmarket.space/868732631107c28u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_60487ef84a750.pdfIn PDF document text
    • https://cdn.sqhk.co/kesokirow/DyZjbvr/bomotexezepesowuzig.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/haZegen/11_garfield_st_fitzroy.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/vaxeruzegubijevekutekoze.pdfIn PDF document text
    • http://netlysy.online/futovax974k.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/forouzan_data_communications_and_networking_5th_edition_solutions_ppt13e1p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_600ae470bbd53.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/igLijjf/city_s_edge_warsaw_mo.pdfIn PDF document text
    • http://italiahot.space/365_essential_survival_skillsf0ip5.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/qhiZCCr/5226197745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_5fd70beee057e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414166/normal_5ff3bee4917f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_604e99dee08da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_6041af85b876e.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/pijiwoguwunumumokut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fd2ab9114dd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_5fc65cbb41f26.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/liwujetobabasebuwegewek.pdfIn PDF document text
    • http://dasezin.getenjoyment.net/widesirevovojugawed.pdfIn PDF document text
    • http://zafikapasipugog.medianewsonline.com/putoxanovorot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonarubitexo.atwebpages.com/pifuzovimof.pdfIn PDF document text
    • http://vepitejususas.atwebpages.com/watchmen_hollywood_movie_hindi_dubbed_download.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_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 5364 bytes
SHA-256: 3780a1f7c8f610ddd204724f59aaedda049e830edd93f7dcd693d1986167b49f
font_01_sfnt_off00010121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10121 12596 bytes
SHA-256: 79218afe1ff40c838c105863749de4bd2010e4e26a0a29070421b4b430568b3f

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