Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d969b5c7ebe2ca4…

MALICIOUS

PDF

69.5 KB Created: 2020-12-20 22:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0c498bfa80d546d9c8a6badfd902fce6 SHA-1: 9e43676719a4302728420c08175697087b10eb61 SHA-256: 7d969b5c7ebe2ca46f4b276e538d8de2d445a7bc70b292a8a660487aa8aa23c3
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and the document body, though heavily obfuscated, contains text related to 'topical pain relief'. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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
  • 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://trafffi.ru/strik?utm_term=topical+pain+relief PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f8d2d4d4451c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5fb7f50917395.pdfIn PDF document text
    • https://jovonawokemurif.weebly.com/uploads/1/3/4/6/134678447/5794674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454179/normal_5fab30aad9b3c.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/f1c38f797a070.pdfIn PDF document text
    • https://risogaruwakev.weebly.com/uploads/1/3/4/6/134634919/6702323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530457/normal_5fbe81ef6b627.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/megulu/xutivufufiloravuxivopez.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/1590868776.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/52610619493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4added04-f59a-46f1-9305-9a67fb5b9a9e/code_the_hidden_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678dc6cc-2763-4a28-93c3-6e6cb047f229/blink_camera_black_friday_amazon.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_off0000d49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49F 4780 bytes
SHA-256: f321ad3c2009569cca2530fa32ebf125703bb9a5591e51f7470ed17a9b07fcff
font_01_sfnt_off0000e4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F2 10812 bytes
SHA-256: 76747a78d3a5841aea0124c047fc7f97e7a76001cf495bc7a43b9bd0ba3b9720