Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf7924f174b028c…

MALICIOUS

PDF

72.4 KB Created: 2021-02-21 01:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 36e910cf6be65082f0c5d30f3684c231 SHA-1: 5819b9c020875d89f887e1f797bfdf981a78e9a5 SHA-256: abf7924f174b028c8cc4d9ce315de90c22db5608e430c96782b49b394aebb330
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/123?utm_term=bose+901+series+vi+active+equalizer+version+2 PDF link annotation
    • https://wirorovikematu.weebly.com/uploads/1/3/1/0/131071137/f1dfc017c123c7.pdfIn PDF document text
    • https://dibasipelop.weebly.com/uploads/1/3/0/7/130738559/gowowive_bijalubabe.pdfIn PDF document text
    • https://rufekelikofevav.weebly.com/uploads/1/3/1/0/131070689/korirotovibev.pdfIn PDF document text
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/getafisejikin-nijerixaxeru-wedemamanuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/fEhiifl/84522588521.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/1Gohedp/business_management_degree_pay_scale.pdfIn PDF document text
    • https://puganijososas.weebly.com/uploads/1/3/1/8/131871778/3295219.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/cqezFhh/26619967537.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/908ec667f5485b.pdfIn PDF document text
    • https://satepiwe.weebly.com/uploads/1/3/5/3/135350267/xepakoxuviwonado.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/hfyidhi/smash_way_hit_pyramids_3.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/bhhjaie/manileraburuwimon.pdfIn PDF document text
    • https://nakaleraba.weebly.com/uploads/1/3/4/6/134606700/menubivon-lovenovaza-forizowaza-gedanirat.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/jujadodedaruxix/franois_charron_informatique.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/us_air_force_uniforms_1970.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/gizunamax.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/79773804016.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/87310922447.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_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 5560 bytes
SHA-256: cae9f2d705383819dd291067be9909930dd48102837019c91248211a14699d1c
font_01_sfnt_off0000f26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 10136 bytes
SHA-256: b71fc9213f37e83edbf42185bcdf7b8a3c7d472b2cbdb2fe100ba202cfdd38d2

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