Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc73ba774dc5095f…

MALICIOUS

PDF

72.3 KB Created: 2021-03-04 07:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8b57caec32025a61985d85f7959f4d8a SHA-1: 4ff3e5d5655ff4bdca90e9b230f9a8c44facc382 SHA-256: dc73ba774dc5095fa894e3715098d8430fdef8ed15c80d3db917f6dc0499e12d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=triangle-interior+angle+worksheet+answers PDF link annotation
    • http://matrixbicycles.com/211261149v13un.pdfIn PDF document text
    • http://istlan.space/wetuzowmgw.pdfIn PDF document text
    • https://zerivomixiloz.weebly.com/uploads/1/3/4/6/134664353/5201313.pdfIn PDF document text
    • https://jiwalevimube.weebly.com/uploads/1/3/4/8/134870165/mulukag.pdfIn PDF document text
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/1326009.pdfIn PDF document text
    • http://about-central.com/wemo_maker_factory_resetym4nh.pdfIn PDF document text
    • http://wujasoxi.22web.org/berliner_mauerweg_gpx.pdfIn PDF document text
    • https://puxikatekeji.weebly.com/uploads/1/3/2/6/132681322/5ef23.pdfIn PDF document text
    • http://leree6.club/lenovo_t430_specs_i5ojw5w.pdfIn PDF document text
    • http://wisecreditscore.info/director_of_customer_service_job_descriptionxgpqd.pdfIn PDF document text
    • https://jaloteke.weebly.com/uploads/1/3/4/0/134096083/rulawakiwufawifi.pdfIn PDF document text
    • http://netewe9.xyz/48737510754yxy10.pdfIn PDF document text
    • https://pemalerokefoge.weebly.com/uploads/1/3/1/6/131606165/xuwoj.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/26c4e7796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xagevudogitoti.epizy.com/82601619949.pdfIn PDF document text
    • http://levigorofelo.rf.gd/44621042948.pdfIn PDF document text
    • http://dukedofabi.epizy.com/13417434387.pdfIn PDF document text
    • http://jaziwovapotulit.epizy.com/41560596488.pdfIn PDF document text
    • http://zaberosem.rf.gd/futolubanorowavofuwojab.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_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 5084 bytes
SHA-256: da5da4fb68d7091e78910081b9964fc857236ecd8cb4f1ea15047ae38aa76247
font_01_sfnt_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 10408 bytes
SHA-256: de6873eb8b745e22c7c8fe346457ab38ed56c4997c00f28aee6f9d22792192ab