Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69477dce85d71d8…

MALICIOUS

PDF

72.8 KB Created: 2021-03-20 15:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c9011678d89c5bc6604c2f0820c9f4d1 SHA-1: 5442312e859ce46c6ff5da002b0e1c44f8824a21 SHA-256: d69477dce85d71d827676b210e2c7f34d74fd1f68b0112eb801bd71ec4f081ad
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 designed to direct users to potentially malicious websites. The embedded URLs and the heuristic firings strongly suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to facilitate initial access via spearphishing.

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://jumiwimov.ru/award?keyword=artistic+anatomy+richer+pdf PDF link annotation
    • http://biggymstoe.com/autocad_electrical_2020_black_book_free_downloadnv3cn.pdfIn PDF document text
    • http://helpforteam.com/40122182589iuea3.pdfIn PDF document text
    • https://cdn.sqhk.co/rulowoka/hgChhd3/granny_mod_menu_1._7.pdfIn PDF document text
    • http://metalllift.ru/96664975489gkvh2.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/city_of_omaha_human_resources_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/hjahj8B/major_mayhem_apk_2.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/kibavutibeved/parental_alienation_syndrome_gardner.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/45860787489.pdfIn PDF document text
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_e18ef0f56d4446808fc917f5739fe716.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/android_box_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/digidowetazurafujamiwizis.pdfIn PDF document text
    • http://zivexotafoni.myartsonline.com/the_power_of_appreciative_inquiry.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_74144dd0f3c54929881c667c1a86626d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefodek/jutus.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/james_allen_discount_codes.pdfIn PDF document text
    • https://d572dbd6-ec42-402e-884a-3db6daac2318.filesusr.com/ugd/6a558d_a270af408388451eb376079bd837c89e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/beginning_latin_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/arm_assembly_language_programming_book.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_c53c576ed91d49d0b9c4f74cc5ec4cfc.pdf?index=trueIn 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_off0000e0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D3 5456 bytes
SHA-256: cad2061c985fa6a772047a8b9947400b73b65ac47c4ad5db40541d584468fb03
font_01_sfnt_off0000f344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF344 10228 bytes
SHA-256: 906274cc1a9c05fd977d603b891835e77d05501705857dc8dbaad611a6a68811

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