Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d2c4c6852fa510…

MALICIOUS

PDF

65.0 KB Created: 2020-12-17 23:31:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6059bd671f19d1a3ed9cd291d6513b7a SHA-1: 9a3b6e889a0c194fc3d18dc9a158fda531d9173f SHA-256: a3d2c4c6852fa51006001cd82c7f3f66c5a93377a17a24f622023fbb4591bd85
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to known malicious redirector infrastructure. ML classification and ClamAV detection strongly indicate malicious intent. The PDF's structure and embedded content suggest it's designed to lure users to a harmful site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=mozarteum+summer+academy+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_5fd16e3ba1ea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5f9f5c5132429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_5fa1f5d47c152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_5fbb3ad0d5a17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f90d6656f4ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426271/normal_5fd1d55f24730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f8fd2a622571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6be53c6ccf69f356f9b0/1606380519025/77534860930.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/causas_de_anemia_microcitica.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe339deaf37e3b64664f2b/1606300576024/felkin_ahn_model.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_off0000bda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA0 5484 bytes
SHA-256: cb02842053f57b67ce2c6d58f5de8b8f8945e0a17eab87ce66c57aa358868eaa
font_01_sfnt_off0000d052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD052 11672 bytes
SHA-256: b8b8696939ad4bf522fa01691ea176b395436494a1a3466128f8835b4dec872d