Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a8b07413d1c532…

MALICIOUS

PDF

74.0 KB Created: 2021-04-17 05:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5ef57cc60e88713d054f9c1c47f7c7a0 SHA-1: edb900303e065baf56d045f2c67fe651c3e26dcd SHA-256: 15a8b07413d1c5326639337aa325b8db7831e49859a8c3a7b2084bb5c58f88e9
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The primary malicious URL identified is https://lozipotod.ru/strik?utm_term=wired+for+love+pdf. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=wired+for+love+pdf PDF link annotation
    • http://cesaregaspari.com/ps_form_3665g1oco.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/blossoms_of_the_savannah_analysis.pdfIn PDF document text
    • http://onlineeshop24.xyz/the_marriage_covenant_derek_princecmvy7.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/52767203803.pdfIn PDF document text
    • http://bandalet.club/vscode_64_bit_freeh85qn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_157f865ed019486d91be0c424c74846a.pdf?index=trueIn PDF document text
    • https://87098103-4d08-48bb-90a6-807b0ef734b2.filesusr.com/ugd/1f49de_89e29e1b60754115a2f69f76c5830a97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazopaju/19408869358.pdfIn PDF document text
    • http://manuwakagekewu.onlinewebshop.net/intermediate_accounting_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc04e7a3-39f0-41c8-969d-b48e030fb20e/rufelapigu.pdfIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_9d57c8f6b9434fd2907e875aab758912.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01516f1-cea9-4282-8a0e-f55570fac01d/44363214765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7870c07f-ab15-45e0-ae19-39f71fe7f07f/32431409293.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/qualitative_research_for_education_an_introduction_to_theories_and_methods_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b8ded96-25ce-4279-a66e-a516aa8a8bdb/72275218360.pdfIn PDF document text
    • https://9f4ad419-87ad-4507-9b23-40b7c7395cc9.filesusr.com/ugd/55478e_e1f499b499e240d1b90120a2d9125aba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/024fec20-722b-41cf-946d-8d094a1d03e1/vivopilebamixetaki.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/jerepobedeludemetus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60d7252-a483-4fd2-8441-f2fc77b12ddd/ketudugosediwivago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2276526c-e38f-4e36-8473-1da846d6d552/78888936440.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/haltom_city_police_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c958913b-00f6-4725-a8d7-93909f622806/how_to_build_septic_drain_field.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_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 4720 bytes
SHA-256: 556a4a3070ff73dfcc970c170ff0736a182faa01de1e4d73f0b64137c5854d76
font_01_sfnt_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 10784 bytes
SHA-256: ab41d138168344782cb3c4377ac4c7c201b8664645360f296c0941e7be01bf08