Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c170f975458a49…

MALICIOUS

PDF

65.7 KB Created: 2020-11-30 20:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0e91058fad531c6a7e43b07d08c8fbcc SHA-1: da9a11130b7ffc6f6b4e7d56ab9197a899f59b85 SHA-256: 28c170f975458a49a53ac9b78833f208471df3abcfabf2958f095270f434d91b
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://traffmen.ru/aws?utm_term=n+t+r+songs++naa+songs In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/12749452925.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/xuxipiwovexopizimazigeguf.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/4340585357.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1366588c99b6d37a92994/t/5fc30335e18c5c478e5ef862/1606615862542/pokemon_sun_and_moon_nerfs.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/filosofia_del_entendimiento_andres_bello.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/affine-_transformation_parameters_regression_for_face_alignment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ff8020-6f68-4555-88a0-b4c6ca3fb013/radiografa_de_calcificacin_de_ves.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/desmos_marbleslides_lines_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/futawan.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_off0000c3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D5 4792 bytes
SHA-256: d24ddf44cfd175f39278361011bc19353e1bb3e50f3725ea1eb4d9e9a00193f9
font_01_sfnt_off0000d435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD435 10864 bytes
SHA-256: f5242104186a937d08a25c7a064bf01e5e7c8e286b221ceb82a0fbefeda1d99c