Malicious PDF — malware analysis report

Static analysis result for SHA-256 574ecea487f9add9…

MALICIOUS

PDF

78.0 KB Created: 2021-04-04 02:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b68c1fce8befdde37a41f478e835840e SHA-1: 72f7b63699677486c18aa6fafc94b88308bb9076 SHA-256: 574ecea487f9add9716575719bba1b4e5725879075ad195a41b2b34298477035
134 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous external URIs, with one specifically flagged as part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The 'SE_URGENCY_LURE' heuristic further supports the phishing pretext by indicating the document contains urgency language.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://vilenefex.ru/wix?keyword=reading+a+ruler+test PDF link annotation
    • http://psychologyrelax.xyz/personal_development_plan_template_care_workerw8x73.pdfIn PDF document text
    • http://pidijajuwupurop.medianewsonline.com/fundamentals_of_engineering_economics_download.pdfIn PDF document text
    • http://widaluvawigomum.scienceontheweb.net/25054168654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451757/normal_600102d2bdd2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5ff6af388c041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_6029fdd9783d5.pdfIn PDF document text
    • http://leree6.club/jeppesen_private_pilot_maneuversza4za.pdfIn PDF document text
    • http://nukels.xyz/what_is_a_survey_in_qualitative_researchkwfoq.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/what_is_the_correct_order_to_watch_the_marvel_films_in.pdfIn PDF document text
    • http://usacreditreport.info/88216566720bzi4o.pdfIn PDF document text
    • http://antinomi.design/57008760810uunne.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488572/normal_606187643f99e.pdfIn PDF document text
    • http://cmbclientes.com/moxenosudebutiveli8996f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472213/normal_5fd049505bfdb.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://bilunijo.epizy.com/benzinpreise_aktuell_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/20673783161.pdfIn PDF document text
    • http://jofikuv.atwebpages.com/24086783721.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/20657131681.pdfIn PDF document text
    • http://mevidow.epizy.com/astm_b209m-10.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/70474900462.pdfIn PDF document text
    • http://lotirejotan.rf.gd/2825468931.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_off0000e7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A4 4772 bytes
SHA-256: 24ea000f5ab69d3360a8293072966a503f7f6b91274e720ce162b64fd9aecaaf
font_01_sfnt_off0000f7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DD 10924 bytes
SHA-256: 8823efeadc749604df197cdce1abb47b4ec47f3ac3eda4be6efd8058788c9f7b
font_02_sfnt_off00011ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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