Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b72c66a9f49fb62…

MALICIOUS

PDF

81.4 KB Created: 2021-01-09 06:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a24777371815d2e66f3b87be3470062a SHA-1: cddd4b182b6c5ff98a3c1658047bdf711a871400 SHA-256: 8b72c66a9f49fb6228552dd1aabf17cad471025fd9786d9e13aa0a0099c39956
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. This URL is presented in the document body, suggesting a phishing or social engineering attempt to trick the user into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=blackweb+remote+codes+for+magnavox+dvd+player In PDF document text
    • https://cdn.sqhk.co/dujujema/U7KEljg/buyout_offer_letter.pdfIn PDF document text
    • https://cdn.sqhk.co/wewutivuv/3Aeiihj/bingo_song_cocomelon_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/nxdBggp/81787667823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472760/normal_5fd1261c6fe7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5f9937c48e5dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/geometry_unit_1_review_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94280649-b18c-4030-ba41-134a23323020/xiluguvumuvedarewovel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ca93f7-b46d-4619-bd88-f2c5e6a1bab9/34905500746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab9c10e-c15d-4af8-bd8c-6c0dccf2a10d/youtube_capture_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471ef9db-deb0-4964-94ba-567ff1eebdbe/how_to_determine_steady_state_error_in_matlab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54709a7e-b24d-4e4d-af4e-ff7b8a7f216f/94510578049.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 5788 bytes
SHA-256: 3e598479b0c605219fd7d79d2db92828b626cce150d57c06a9a94ccfd53798e6
font_01_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 12412 bytes
SHA-256: e50ef5820fb1649e56f62ed3331bc64c1581a5ac9fcb2e87f0e8096f7f05844f
font_02_sfnt_off00012a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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