Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc95b00d17fa846…

MALICIOUS

PDF

83.2 KB Created: 2021-02-25 02:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0cf137704074f5061034b5650c9869f8 SHA-1: f9d75b7b214d522b602f8449c29412cd21f9aa2c SHA-256: 2dc95b00d17fa84666933b91d29a9c215678678da0e463387381bedd7b2a3230
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, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary malicious URL identified is 'https://baarspo.ru/strik?utm_term=aba+model+rules+1.13', which is likely part of a phishing or malicious content distribution scheme. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further indicating malicious intent.

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://baarspo.ru/strik?utm_term=aba+model+rules+1.13 PDF link annotation
    • https://gugozakeku.weebly.com/uploads/1/3/4/5/134588211/6022489.pdfIn PDF document text
    • http://patagoxipu.iblogger.org/60192232735.pdfIn PDF document text
    • http://netubekebusis.iblogger.org/91808496623.pdfIn PDF document text
    • https://malavaxun.weebly.com/uploads/1/3/4/0/134018228/6264120ffae.pdfIn PDF document text
    • http://yachts-4-sale.com/jisexezamesubfiaq.pdfIn PDF document text
    • https://tezigawoje.weebly.com/uploads/1/3/1/3/131379443/6237478.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/sizadagazagaj/tennessee_waltz_line_dance_step_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/inquisitor_martyr_beginners_guide.pdfIn PDF document text
    • http://gofuxanuwuj.rf.gd/73671679105.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/frozen_invitation_card_maker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/nonconformity_and_corrective_action_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/solving_logarithmic_inequalities_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/zabuvosofufewubelula.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/82708521731.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/28446178377.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/befunky_pro_free.pdfIn PDF document text
    • http://xujekodade.epizy.com/darakopikejefuvebemetom.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/14908246787.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_off00010a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A63 5348 bytes
SHA-256: c0193a77aff6b68287780e673dfe340e5b87b453151e38f65be8c0e473cff07d
font_01_sfnt_off00011c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C82 10340 bytes
SHA-256: de5243628fb2d9e954c36aa4c83aeeb54c6abb8e9c3f05631af897dccb2845a8

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