Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eac404e92601050…

MALICIOUS

PDF

71.4 KB Created: 2020-12-02 05:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e3e4308cb1399c75d331133648daf5dc SHA-1: 1bea83baa8d587f26c6d4fe812815943c76873c4 SHA-256: 0eac404e92601050df3b554e80740e64c45af38ab550e54917d9f6dc745d6baf
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI, 'https://traffnew.ru/123?utm_term=loaded+language+definition+synonym', was extracted, suggesting a phishing or malware distribution lure. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=loaded+language+definition+synonym PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505102/normal_5fae3c722613d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_5fb64094bfca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5f96652cf411c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_5fbf101536b0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f8b43de54585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5fb03f1b8f085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f9268fe66af9.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/3920690.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/bugutaj/rexafef.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/voice_recorder_free_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/carnatic_music_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/zukuwivuxifezifefe.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_off0000d87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87C 5176 bytes
SHA-256: 3953fe982c8183b3a3d894322a3c39919f8942a8e9d0ad039fb7235e600d1cd7
font_01_sfnt_off0000ea1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1F 11676 bytes
SHA-256: 66e3c74f45cfa4e44fb10ec1781640904d6d0c90a7372b267aeee0af25e3023d