Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb602a6984f57905…

MALICIOUS

PDF

78.2 KB Created: 2021-03-31 22:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3782493dbc2caeb67b7866c8c4b52429 SHA-1: ecc707ed6296e6517cbf80b36b55b6a3fc0f6b03 SHA-256: eb602a6984f579059f745e2ceade4c79a16c95a0d6741c69cd95b6243131ea19
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. One of the primary URLs observed is 'https://seumenha.ru/strik?utm_term=usa+volleyball+impact+training+online', which is likely part of a phishing or malware distribution scheme.

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://seumenha.ru/strik?utm_term=usa+volleyball+impact+training+online PDF link annotation
    • http://artdebug.site/808079978384tkqy.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/tawemamedujilolqgif9.pdfIn PDF document text
    • http://microdigitalmeter.xyz/40014908756o5bmz.pdfIn PDF document text
    • http://dimoguzix.iblogger.org/how_to_put_sd_card_in_roku_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/726e44ab-ec3e-401b-a910-fb9ed28620a5/nakaxarisuberitike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d09b4d-3ee2-4126-8468-93e518760ee1/do_family_dollar_employees_get_a_discount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23be5015-25cf-478a-8d52-67ccf76d40ad/zunewozinoderurikutagepu.pdfIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_bc8113919f504792a62f5cbef487e676.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/de366d5b-3bfc-4b76-8db5-c0b3f04f5f28/43021769602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2925ea4d-3a64-48d1-8d7d-aa1e3c955d70/fudonowufij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e844b3c-04a1-4bc4-b9b4-494a9316838e/wuledobasanilujezigirupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6e8fc19-1bb3-4172-b660-91a918120580/wofigozidezinufididamor.pdfIn PDF document text
    • http://tunakaxawonisov.epizy.com/me_before_you_trailer_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5b70cc-377c-4ba7-960f-58fcefd859b2/calculo_de_integrales_impropias_ejercicios_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bb393a-8cf8-4528-8e70-c0fc80436278/13217472776.pdfIn PDF document text
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_f6db6fd5fa5848ca962cdd57812c3557.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9b4cda-b003-4d04-b312-bebcc3d693f2/92066409566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a753ca-79a9-407a-84f5-0b8c23c9dde0/73543922410.pdfIn PDF document text
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_1981012c75784226b449b57736c69aaa.pdf?index=trueIn PDF document text
    • http://mewilibuze.epizy.com/90784730163.pdfIn PDF document text
    • http://bovuzigaratufob.rf.gd/algorithms_and_data_structures_javascript.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579960cc-a5b0-4f8a-bb34-d8be94942da3/2019_tesla_model_3_for_sale_near_me.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_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 5544 bytes
SHA-256: feaa359dfbe151d7f61665656ac79e7e759e39908f133d4595ccb08e1efde663
font_01_sfnt_off0001078f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 10376 bytes
SHA-256: d204250077ef94704ff58422f360c5c34f777abdcce30643961f2b0527a509c2