Malicious PDF — malware analysis report

Static analysis result for SHA-256 504d564da605bca4…

MALICIOUS

PDF

73.1 KB Created: 2021-01-04 02:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: abee951a9c21a6a4f19aa771fa6e907b SHA-1: 724b419eed7ae86e7baf2cfb2e99725927f06db8 SHA-256: 504d564da605bca42cac310df67e006e784272eca2eee070553fabb9cde14a8b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://traffmen.ru/123?utm_term=veal+cooking+temperature+celsius In PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5fe053ae85358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f8a994394ee6.pdfIn PDF document text
    • https://vudufidobisij.weebly.com/uploads/1/3/4/6/134673615/verel.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/4165744.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/luropi/create_new_panel_schedule_template_in_revit.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/pajidumibajoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe07352-7b47-462b-9c9b-d532d5e83fc6/89549464567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f28572-dd78-4a25-8465-89be719fb5c7/99406943294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d7197e-af8d-4336-b8f7-50d111ab6265/colegio_san_bartolome_rosario_sistem.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_off0000e128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE128 5280 bytes
SHA-256: c98275e11c305d9939e74d049335e28a287546f24cd1232ccd281021e7c44275
font_01_sfnt_off0000f310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF310 10732 bytes
SHA-256: f8e8ce6303d3fcc91099d76106fb2b9695fd60ac147d586cf387c82d9eb7e264