Malicious PDF — malware analysis report

Static analysis result for SHA-256 077856cb0f07291e…

MALICIOUS

PDF

83.6 KB Created: 2021-02-20 11:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 5a76795ef60875be17e46a5789431b37 SHA-1: 2ecdc19d8fb2f4c8f1aac1f6952f8d8737f78eb4 SHA-256: 077856cb0f07291e328b511ec650090e98be1552dff507d68d6eaf7aa9d8e448
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic and ClamAV detection. The primary external URL, https://jottigo.ru/strik?utm_term=monster+2003+full+movie+online+free, suggests a lure related to movie streaming. The ML classifier also strongly flagged this PDF as malicious.

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 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.
  • 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://jottigo.ru/strik?utm_term=monster+2003+full+movie+online+free PDF link annotation
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/bozilonagidufudiv.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/hfbojgd/71966353112.pdfIn PDF document text
    • https://xefezabegeritaj.weebly.com/uploads/1/3/1/3/131379478/rixunopuzaxokizuv.pdfIn PDF document text
    • http://fogozuvonuw.66ghz.com/black_boy_haircuts_2019_apk.pdfIn PDF document text
    • https://kosonijuzar.weebly.com/uploads/1/3/5/9/135974682/560d85c5e974.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/cpxv8hg/95683137854.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/g2jbhg1/kobawibozajilore.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/hAhgRVY/fazem.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/fNWjSqy/lobby_elizabeth_nj_menu.pdfIn PDF document text
    • https://kibidabusiben.weebly.com/uploads/1/3/1/0/131070702/vatewowube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/71554242216.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/23499174313.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/wamujalezatewuvu.pdfIn PDF document text
    • http://doxekapop.rf.gd/97967287153.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/coffee_day_global_limited_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/formato_carta_apertura_de_cuenta_nomina_bancolombia.pdfIn PDF document text
    • http://teredibake.rf.gd/autocad_student_version_2018_free.pdfIn PDF document text
    • http://potubavaziripek.epizy.com/aiou_date_sheet_b._a_spring_2019.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_off00010967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10967 5204 bytes
SHA-256: d245747f396bf450e44dc49b2731b8968732e3f81aae7537ce4d47715e4d1ca2
font_01_sfnt_off00011b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1D 11360 bytes
SHA-256: 8c3d1685a89eca0942daab515f648fdbdbb3aa3420569cdd3d84017fa78ad228

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