Malicious PDF — malware analysis report

Static analysis result for SHA-256 39de3a0868b695d0…

MALICIOUS

PDF

70.8 KB Created: 2021-02-13 10:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2387d46c5e08d3cd945cec7af76111c1 SHA-1: cf9912fe54b136aaed29bae59f26a8fd173c9767 SHA-256: 39de3a0868b695d099feca8ded62ac3d2fdd977cd7400cc1e7b932affdfe61c9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL points to a search result page, suggesting a lure to external content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wb?keyword=anjathe%20songs%20%20tamil PDF link annotation
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/wapetubaseko-xuvezozoz-kufepovidagi-tijurudasobanip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5fca6c7c4fc64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fcefe12f31bb.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/kuk_distance_ba_final_date_sheet_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477386/normal_5fdc8853005cf.pdfIn PDF document text
    • https://buxijabis.weebly.com/uploads/1/3/5/3/135329720/pubuzuwebawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5fe422d2d1598.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370087/normal_600306293e428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449178/normal_601c767ebc951.pdfIn PDF document text
    • http://scriptbook.xyz/892814166287mqkp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nebamolowitumik.epizy.com/cash_loan_agreement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/pewilazaveb.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/ato_depreciation_guide_2017.pdfIn PDF document text
    • http://wanedinak.epizy.com/95322631235.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_off0000d8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C0 5068 bytes
SHA-256: d0b88a668dc7d123d87ebc919878b5e456d10387e7d5142f3ace1dd0d9aa6b64
font_01_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 10752 bytes
SHA-256: fdd1c430c5dc72be4eaf456d3ee249aa65ee87ad5db6cf8e9894bedea3740433

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