Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e196cb5368f9ab…

MALICIOUS

PDF

79.4 KB Created: 2021-04-01 19:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 70f6a2ca8c1f8cb87839c375ba4fea7d SHA-1: 3a795af0f83674993ac75297be49976e4a0cd0ed SHA-256: 18e196cb5368f9ab8e1e9cafbaf9ff64fb3b62475a003f0145a9ef6734c9b174
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that is likely part of a phishing campaign, disguised as an invoice template. No scripts were extracted, but the presence of the malicious URL and the classification strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=manual+invoice+template PDF link annotation
    • https://cdn.sqhk.co/zubafena/hvhcjfU/verizon_answering_machine_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_600a546db1b4d.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/e27haEJ/54649132388.pdfIn PDF document text
    • https://cdn.sqhk.co/ramowejub/jibuPSU/zigugusonibujolerifud.pdfIn PDF document text
    • http://fivadoguna.medianewsonline.com/how_to_determine_an_authors_point_of_view.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/93SjeX1/tajumopuza.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/hgZjgPA/vurupixasib.pdfIn PDF document text
    • https://cdn.sqhk.co/garisuvonuk/jjjflgd/evaluating_difference_quotient_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_60325a4487c85.pdfIn PDF document text
    • https://cdn.sqhk.co/rugofufol/zMQmjdK/88434916048.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/ihjboOc/best_books_on_napoleon_in_russia.pdfIn PDF document text
    • https://cdn.sqhk.co/zujomawa/gh0QgiJ/67571345412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469374/normal_603cbbfac3c53.pdfIn PDF document text
    • https://cdn.sqhk.co/wunemuruk/gdigSib/subus.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/28f5f5b9-5662-472e-8e21-435c555a9ceb/7912279753.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/nagiz.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/lewiperirujulegumekediza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0350bd1d-3177-4096-8d2c-5d4139e2db17/does_directv_have_wireless_receivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aebe542-43d0-4e9f-9f97-22e03e303158/how_to_program_genie_screw_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/tipezomug.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_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 4872 bytes
SHA-256: 4c054ebfc0d264a2c65827ac6d84ebf43c873cbbeff82a6de2b91b12775a20f6
font_01_sfnt_off000108ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BA 12104 bytes
SHA-256: 544c0e00c0141bd6ccb68681afcc579fb1c9b4882d9510eb96b8413dfcf544f2

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