Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e86c46220cb74e2…

MALICIOUS

PDF

79.5 KB Created: 2021-03-28 20:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 72919ca17c0395e9389d1bc067422a21 SHA-1: 5c572c791915862d0d8b0b2e3e3a2be000ff81d7 SHA-256: 1e86c46220cb74e29604cee2a4cc1ed124a3c2932e8fac2a34209ece62993eb7
126 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded URL, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The PDF_URI heuristic points to a specific URL that appears to be a search result for a book, suggesting a lure to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=pandemonium+lauren+oliver+pdf+espa%25C3%25B1ol PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372673/normal_5ff5b1e4e8a51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448984/normal_5ffdfbaa38bcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_5fe969950347c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_aad219f5a20944f0bfd0e830e4f3d783.pdf?index=trueIn PDF document text
    • http://femofurawu.epizy.com/danalelukiwezasexufigugi.pdfIn PDF document text
    • http://gesubonepalit.epizy.com/analisis_psicologico_de_la_pelicula_como_agua_para_chocolate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233fff69-3717-4ee3-9d82-13d2e176ddea/briggs__stratton_625_series_190cc_parts.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_d8cbd2ec3d644d70af660037d96aba2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/gimosaxetixowel.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_01a4ef52fb2e4023be36c6ac55c3a7f2.pdf?index=trueIn PDF document text
    • http://bekapoza.epizy.com/zebumijopimopur.pdfIn PDF document text
    • http://gejepeb.rf.gd/tapabavizixawinufaki.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/2007_civic_reset_service_light.pdfIn PDF document text
    • http://jozixal.epizy.com/34057349412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0a4f09-c650-4c15-b5b9-5f1df5331229/64127047622.pdfIn PDF document text
    • http://fonimegalidoxu.epizy.com/annabelle_2_movie_hd.pdfIn PDF document text
    • http://tezafafowajij.epizy.com/ooma_hd2_handset_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/14353522265.pdfIn PDF document text
    • http://popedufi.epizy.com/salesforce_matrix_report_conditional_highlighting.pdfIn PDF document text
    • http://fuvojofud.epizy.com/xafezisuzak.pdfIn PDF document text
    • http://serefelotu.epizy.com/susizim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e68e8d-bb09-4bc5-a2ff-622169402f2b/the_missing_movie_2020.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_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 5460 bytes
SHA-256: e8239cf6241f09aa8c048c727b08ec7c00078d39856e9fdcc4f70c402462bd2a
font_01_sfnt_off000107bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BB 12008 bytes
SHA-256: 746d6a5efe4a3e7f118e580020ef233c2181b38a9555b250d221d8ea8013620d

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