Malicious PDF — malware analysis report

Static analysis result for SHA-256 d317594d5229df6b…

MALICIOUS

PDF

68.9 KB Created: 2021-02-12 13:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ba30bc6eab05886bc5ec679fe7fc1f7a SHA-1: b835f0d618a36931e86c78045d0b1b69631a3a3e SHA-256: d317594d5229df6b725ec010446bb862a00bd5e34819a61fb2328535273b0f46
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous external links, with one pointing to 'seumenha.ru', suggesting a link farm or phishing attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of malicious intent, likely related to spearphishing or SEO manipulation.

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://seumenha.ru/wix?keyword=heart+dissection+labeled PDF link annotation
    • https://fokomawirofuteb.weebly.com/uploads/1/3/0/9/130969657/5842524.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/7753254.pdfIn PDF document text
    • http://ledy66.net/48201862831lz99m.pdfIn PDF document text
    • http://supportcopyright.net/platform_bed_frame_plans_free28y86.pdfIn PDF document text
    • http://stalekost.site/45767805342ftkl0.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/temujonuwu/the_beeches_care_home_cqc_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/login_page_template_angular_8.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/fisabaverenavufobudok.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/61075960330.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/wifusinoturinizuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/pexiluj.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/nexet.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/compare_2_excel_spreadsheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/93288013974.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/xenelafunaxuler.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/ccsa_checkpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/67523472228.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/autodesk_inventor_2014_crack.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_off0000d46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46C 5032 bytes
SHA-256: 3f2a541b9d77fb28256016a7ca60ae771bfd026d7865042a9425c430a5022bad
font_01_sfnt_off0000e58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58F 9592 bytes
SHA-256: 3d65552a83949d6058b895a65e162de5d98336ab5c8b3f41228a6905041f8d87

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