Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b0e7352fb0ed18…

MALICIOUS

PDF

76.9 KB Created: 2021-04-30 22:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: eeb55fbc88e05574b446eca7d791461f SHA-1: ea4d2e3a1c8e214762fbe278389af60c8cadbb16 SHA-256: b2b0e7352fb0ed183237d19935c3c852336a1ac92bee5d81bfd9d630f2a6ce98
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs and the document's structure point towards an attempt to disguise malicious content as search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/strik?utm_term=toshiba+-+dvd+player%252Fvcr+model+sd-v296 PDF link annotation
    • https://juzowugaf.weebly.com/uploads/1/3/4/7/134773334/7979926.pdfIn PDF document text
    • http://xasujaru.22web.org/blank_calendar_template_2018.pdfIn PDF document text
    • http://sumaralomemev.iblogger.org/92555728684.pdfIn PDF document text
    • http://wajoxur.22web.org/kipipelowiz.pdfIn PDF document text
    • http://pebunoguge.mygamesonline.org/acetilcolinesterasa_funcion.pdfIn PDF document text
    • http://musumavugas.iblogger.org/carte_du_monde_a4.pdfIn PDF document text
    • https://kozenuxifojani.weebly.com/uploads/1/3/4/6/134665776/c74fb555e644.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/teori_akuntansi_sektor_publik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mumelekuxo.epizy.com/candidase_de_repetio_tratamento.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_6ec90783db174809a85e1c7862e582f0.pdf?index=trueIn PDF document text
    • http://kefekebew.rf.gd/50000011725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8683056-1d37-40a5-abaa-af465088d512/quotes_from_mary_rowlandson_the_narrative_of_the_captivity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50ba4db-56f5-47d6-8af4-b9d3d7295000/razagugokepixesolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41de5c0d-c68f-4efc-afee-214a192a133e/dog_mange_treatment_cost.pdfIn PDF document text
    • http://tepominofujemo.atwebpages.com/unipolar_depression_vs_bipolar_depression.pdfIn PDF document text
    • http://xidozex.epizy.com/namiralapotobudafaliker.pdfIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_427d577019034b538718e49557c44def.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee8847f-8b09-4c66-aa9b-6de9f7d58746/orion_tv_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/befe6d1e-6abb-4771-bdc0-614dde61710f/movie_maker_free_download_for_pc.pdfIn PDF document text
    • http://wororeba.epizy.com/12369870054.pdfIn PDF document text
    • http://zeluzara.epizy.com/crm_software_comparison_chart_and_guide.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_2dfcfba772b04178b28e55c89320e4b8.pdf?index=trueIn 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_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 6072 bytes
SHA-256: 958dc217ee2f3edd46fc6c79a041db4ec833b1fee76fe7ef89eca0d9ca32006c
font_01_sfnt_off0000fe95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 11268 bytes
SHA-256: a654cbd299845ccca15ddf0e557e7c467b63832eb81c15d425c1800b91e9ee06