Malicious PDF — malware analysis report

Static analysis result for SHA-256 219024418e3ea993…

MALICIOUS

PDF

85.1 KB Created: 2021-04-05 01:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 35e047e5e127bbea568e2dd12e26f345 SHA-1: d4fc916fb4b8da2385e9510226c6b1dae93d77f7 SHA-256: 219024418e3ea993787af6da211b860e8fb99456f9344b77918a1eb27bbcca09
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous external links pointing to various domains, many of which appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the extensive link farm suggests an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://botokaw.ru/strik?utm_term=escuelas+de+la+psicologia+estructuralismo+y+funcionalismo PDF link annotation
    • http://paxosij.mygamesonline.org/agenda_2020_17_objetivos.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/adobe_acrobat_pro_dc_accessibility_guide_creating_accessible_forms.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/anatomia_del_aparato_locomotor.pdfIn PDF document text
    • https://lekekupoj.weebly.com/uploads/1/3/4/5/134513515/9481134.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/xinegovatuk.pdfIn PDF document text
    • https://cdn.sqhk.co/vatepasoxi/eLhhjeo/os_axiomas_de_zurique_max_gunther.pdfIn PDF document text
    • https://tapotupuj.weebly.com/uploads/1/3/4/8/134866757/6b22b1091b55.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/45730485692.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/Uia6jk8/dunuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/JjsgcEm/60976349172.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/RhhWxjf/bovelusuwenefufabemu.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/gemabuvasiwinol.pdfIn PDF document text
    • https://gubijebe.weebly.com/uploads/1/3/1/4/131483267/repajijolumew-tupadazifu.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/fazobonemo.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/dhinlhf/kung_fu_panda_turtle_quote.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/giihqDF/ticket_to_earth_ipad_review.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/mufemutavise.pdfIn PDF document text
    • http://kisizifavo.getenjoyment.net/indefinite_articles_rules.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_d564f847bf4d4cc89b721d1af292ac98.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_c9decd06754146f4b014723fb991e12c.pdf?index=trueIn PDF document text
    • http://zijiwaras.onlinewebshop.net/simugekimukewilezu.pdfIn PDF document text
    • https://034b020c-baab-45d1-b3ff-c950d21f9178.filesusr.com/ugd/3c93bc_e755f6550504483a98bf622d2e46c63b.pdf?index=trueIn PDF document text
    • http://mifotabelimudon.myartsonline.com/daweseduwekurufut.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_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 2028 bytes
SHA-256: 868d6c4b7113799caaa06567681f7b671a99ea5d6c8bdd43a098eb7aef5b2c15
font_01_sfnt_off00010a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4F 5532 bytes
SHA-256: f5c657ae1505387a8bd12db0f6449f4a2dfa790a27851a7bf4f173b7dcbaec3d
font_02_sfnt_off00011d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1C 11832 bytes
SHA-256: 2d058a5735417bbf1371b6b5602882a9c0c6b160a6f35c6a07fcc827cfa34905