Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dff1fb0bee46b8a…

MALICIOUS

PDF

75.6 KB Created: 2021-01-14 06:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c74eb5845ba1d7d8ac952779f25ff78a SHA-1: 8d0965ac7fc94bb0e87e60343034b76a372a5bcd SHA-256: 7dff1fb0bee46b8afc4aa524466b7ba53019cac3849b0e445842e224e2b9b0ba
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?utm_term=post+nuptial+agreement+template+new+york PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5f908303e6fa7.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/hiibN87/dosarifamezezozarir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482870/normal_5fb2e9078b33b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389793/normal_5fadce801be2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_5fbe6fa21bb0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5fb8230d576f4.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/zjiWjbv/didedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5fd7def6d190c.pdfIn PDF document text
    • https://cdn.sqhk.co/zanaforare/jduYial/zitufaje.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/jhWiejw/allen_theaters_farmington_nm_job_application.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/gowebabuxogiro/critical_success_factors_ppt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/52139095379.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/general_questions_and_answers_for_civil_engineering.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_off0000eafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFD 5400 bytes
SHA-256: 48637de98604239f20fe8605d04e5385855048b976ec719c10e6fdb4522bc9d8
font_01_sfnt_off0000fd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5C 10532 bytes
SHA-256: b5079c19d479c0bec4e68a66398ca354011eccb9f4a98d0db97fde7d8f602d73