Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc98be3b0c990181…

MALICIOUS

PDF

67.0 KB Created: 2021-01-14 04:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2826dc2b15536dd73ebc6bfd1bcc2631 SHA-1: 8a123d0a594acc413628ab4e81a9af991b96b990 SHA-256: cc98be3b0c99018101c19e7e9c101bd617383d71222f58d5869b25048e7e9216
96 Risk Score

Malware Insights

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

The sample is classified as malicious by ML and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI heuristic points to a suspicious URL, 'https://traffine.ru/123?utm_term=area+code+502+location', which is likely used for phishing or to download a secondary payload. The document body contains obfuscated text and metadata indicating it was generated by wkhtmltopdf, suggesting it might be a crafted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffine.ru/123?utm_term=area+code+502+location PDF link annotation
    • https://cdn.sqhk.co/merodobiweve/RXA73FT/gs_racing_storm_buggy_parts.pdfIn PDF document text
    • https://site-1167951.mozfiles.com/files/1167951/licence_to_wed_parents_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377381/normal_5fce8ce755b63.pdfIn PDF document text
    • https://site-1185944.mozfiles.com/files/1185944/ishikawa_diagram_template_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/djeTgj0/tattoo_font_maker_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463554/normal_5fe4ea5f69d38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380210/normal_5ff3ce7cc4772.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478683/normal_5fdeee9900a65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477155/normal_5ff2b60b3d322.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/makumapikeze/terminator_4_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/miturakixuduf.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/matetafegepi.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/43804531541.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/44394749286.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/mla_format_citation_website_without_author.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_off0000c857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC857 5144 bytes
SHA-256: 91b27c3b6f18a596af82c3fbc3636667bfa07846c8d19fdbc87aa6074f034dff
font_01_sfnt_off0000d9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E7 11424 bytes
SHA-256: e0a8a9d1dd45ea6df8a0f5fbd124afc260e6bc028451b1c93f8692d5637cf985