Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a452cefadee9a3…

MALICIOUS

PDF

88.0 KB Created: 2020-11-18 19:54:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b7a42cfc40f1cffa16aee03c62c8f764 SHA-1: 1b8d1cfeca23905ec0447f9f778481014ebae7bc SHA-256: 43a452cefadee9a374095036b28a36ee32939ce0b83ada75686d22214dc880fb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit the user's trust by directing them to a malicious site.

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://trafftec.ru/123?utm_term=helena+bonham+carter+young+emma+watson PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5f93841b647ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454665/normal_5fa02dfc2879b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_5fad91e0b6628.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/375cd2b2-12f2-420a-bc23-9db3d403fac3/47599890162.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/47609464456.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/7631089418.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/44886999509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd8b809-b056-498c-92ad-bd4eda425a11/51961977018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf01330-cd9c-4871-81dc-8aad81c8e4cc/12008641496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10b33ba-c7ef-4097-9395-eb2fc25d6624/49769927187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35640657-f6da-44ed-b674-6ce70c8caa31/code_geass_royal_family.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b30e5603-199c-4b08-82d1-e77e578f20cc/cisco_linksys_ae1000.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/pirilunamosowatipewib.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_off0001193c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193C 5508 bytes
SHA-256: c2622a352885c1fb11f9053f3ed27aca79692dabc19483957513fa157e57bdce
font_01_sfnt_off00012be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE2 12272 bytes
SHA-256: 4a9cae4c2a1cf90d7a5822a14770c80e0eb61808756632404b75397c90fffaee