Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d27d039ad643ab…

MALICIOUS

PDF

78.3 KB Created: 2021-02-26 00:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 737af9b5031ee0cffd7173132b27c962 SHA-1: dbf5be970f9b95808f5749edd2fe41fc11b17e4f SHA-256: d0d27d039ad643ab8a9b9c660163a5b018ba7a4e1041c21fa841ff10dc55f30f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link-farming campaign. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with 'http://newyearshop.site/kidugaburora8hauk.pdf' being the first identified. The embedded URLs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=is+dunkin+donuts+decaf+water+processed PDF link annotation
    • http://newyearshop.site/kidugaburora8hauk.pdfIn PDF document text
    • https://jupurelapuloful.weebly.com/uploads/1/3/3/9/133997255/tokibuvamimof.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/3845133.pdfIn PDF document text
    • https://bilugejedegigel.weebly.com/uploads/1/3/4/0/134017605/2382047.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/aheqig2/terojamejumeral.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/heCjcmJ/25961460562.pdfIn PDF document text
    • https://milafesubori.weebly.com/uploads/1/3/4/7/134745217/6239416.pdfIn PDF document text
    • https://cdn.sqhk.co/vexagajezesa/ihjbGic/the_trail_of_tears_route_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://valapapiwusujeg.rf.gd/utopia_std_caption_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/academic_cv_for_phd_application.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/52739308393.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/a_s_t_c_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/99662648474.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/geketewamaxa.pdfIn PDF document text
    • http://sowinoto.epizy.com/13205809511.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/lodash_template_alternative.pdfIn PDF document text
    • http://danijikuguwidak.rf.gd/96509806458.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/23726626498.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_off0000f5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D6 5208 bytes
SHA-256: 8800c29fcc2a0ad358a71488922249feee63286892a9689bcfb76f71541d430d
font_01_sfnt_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 10584 bytes
SHA-256: d5e8c73c4f9eaca210e1d41c49bc759159ede506c7c553e6c4080302627e6e77

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