Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de0d4407b1699ea…

MALICIOUS

PDF

80.4 KB Created: 2021-05-08 20:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e0d25c68248bf25204199e297852498 SHA-1: 500dda52ec79eb733e1a1eac7db133a4f8a3ba6d SHA-256: 7de0d4407b1699eabf6e567c4a81768d49fa124a4123b6d73996d7655e13226e
126 Risk Score

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 0.9961

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://jumiwimov.ru/strik?utm_term=how+to+wire+honeywell+rth6500wf PDF link annotation
    • http://vugaganopofom.mypressonline.com/16970275057.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/ghiheih/wefitabinezulevuwiwurar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367007/normal_5fedc4199abc4.pdfIn PDF document text
    • https://cdn.sqhk.co/mareduviger/3jgiigd/pofosatakape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_6057964fe8ef5.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/Zb7hehf/nezunefavowuvetugukatuxij.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/n6v3gfY/4445961355.pdfIn PDF document text
    • https://cdn.sqhk.co/likunubiba/cLjjxia/broken_screen_prank_iphone_8.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwiwejagub/dlUnqmf/rakekupube.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/gqjbJia/siberian_husky_price_puppy.pdfIn PDF document text
    • http://wixujikubipom.mygamesonline.org/9083638672.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/jg6jaGQ/wekunuxupexurifozuze.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/3szlBtd/33628928016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484143/normal_6050073f0a171.pdfIn PDF document text
    • http://rekugegik.scienceontheweb.net/vikediwunuf.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/igDgije/xilujajeja.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/principales_causas_de_la_contaminacion_del_aire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5fdab78a875e0.pdfIn PDF document text
    • http://tujidal.mypressonline.com/13880505864.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/vemoguseraja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453902/normal_5feccad604847.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/wupuxus/17732332702.pdfIn PDF document text
    • http://gitodake.myartsonline.com/airline_business_process.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/metformina_500_precio_ecuador.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/65464692993.pdfIn PDF document text
    • http://ruzakema.onlinewebshop.net/juxevomalizanovavewawape.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/bixunidazeza.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/is_alkaline_stronger_than_acid.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/marks_and_spencer_skirt_size_guide.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_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 5040 bytes
SHA-256: 0d5bc746692030f6e62b4aa1d50b18c15c92f70b9f16bc1c26fd990efa2d9ec1
font_01_sfnt_off00010e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E07 11032 bytes
SHA-256: 70bafe2632761168afc095580ec818d084623698e0f4b82f7ead7eabae2c1b52