Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbba19991f8f3cc…

MALICIOUS

PDF

79.2 KB Created: 2021-02-15 08:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bcdf3ac9163428d89512f38f323f6806 SHA-1: 9c1b0d432141cf2019296920fcfe1e00583d9dd9 SHA-256: ccbba19991f8f3ccc05c43fea2ffbb241e236cbfe744c5c6f45328de99721f49
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL being https://seumenha.ru/123?utm_term=short+course+truck+vs+stadium+truck, suggesting a phishing or redirection attempt. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports the classification as a malicious document designed to lead users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/123?utm_term=short+course+truck+vs+stadium+truck PDF link annotation
    • https://cdn.sqhk.co/duponetix/fW3jgjb/xepox.pdfIn PDF document text
    • https://mogivara.weebly.com/uploads/1/3/2/7/132712472/tomavabevag-susapejiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_60149ee5e92c5.pdfIn PDF document text
    • https://samivixawudajan.weebly.com/uploads/1/3/4/6/134634686/nafetolewa-zomuviwodu-ferexawufixem.pdfIn PDF document text
    • https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/f48e9.pdfIn PDF document text
    • https://pujapuvefebawu.weebly.com/uploads/1/3/4/5/134581836/nimotidonito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_602123ef2ac06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453909/normal_601ee2f33b2f1.pdfIn PDF document text
    • https://vobilazi.weebly.com/uploads/1/3/5/3/135300702/tulizoliz-timuki-reselebunu-liduvududuwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5ff71151e1ded.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/9357536.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vurisadazuxe.epizy.com/17651542918.pdfIn PDF document text
    • http://zafurug.epizy.com/abiudi_misholi_nimechoka_kabisa_audio.pdfIn PDF document text
    • http://petekukeseji.rf.gd/24565700569.pdfIn PDF document text
    • http://jegigas.epizy.com/encyclopedia_of_life_support_systems_free.pdfIn PDF document text
    • http://popirarubinuluk.rf.gd/metastatic_melanoma_treatment_guidelines.pdfIn PDF document text
    • http://josegofubusem.epizy.com/kaxesaxijil.pdfIn PDF document text
    • http://mizadebep.rf.gd/nazebebevapezu.pdfIn PDF document text
    • http://vaforapibasaw.epizy.com/midobom.pdfIn PDF document text
    • http://nowapuporab.epizy.com/vepasazatosa.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_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 5372 bytes
SHA-256: 7adb9e712b29ab8f5fcce9df806e5677a305bab2a47bab22117f6fa929b777e4
font_01_sfnt_off00010bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAB 10556 bytes
SHA-256: 51f1079a3d10c4b10cd6754d16a0525b7c9d84702894c81a05ab343ed16827be

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