Malicious PDF — malware analysis report

Static analysis result for SHA-256 43785bc47bab3c83…

MALICIOUS

PDF

67.0 KB Created: 2020-11-25 05:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f9e7a91c158e71b4416003b9d24d3272 SHA-1: 0a3eeac08eface4b91df5e87b6d2c17e4e493a4a SHA-256: 43785bc47bab3c83e1f09f18a5e80af5c77a2ee7779f9caa5c4007aacc51f4af
96 Risk Score

Malware Insights

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

The PDF file contains a URL that leads to a phishing site, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, appears to be a lure related to 'thermal insulating powder coat'. The presence of embedded URLs and the overall malicious verdict strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffnew.ru/strik?utm_term=thermal+insulating+powder+coat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413369/normal_5f975925bb300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447467/normal_5fb8caece2725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5fb58cf1275cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408588/normal_5f93783846f33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_5fb8c06e08b9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5fa7db8deea10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8d8775e7d69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5fa262ce16ee7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a90222-7948-4a72-a750-e2746197ef4d/92313375901.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/lopowowimisogikukavab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37efcbc-aa57-4029-be61-0329f7492058/how_to_start_a_debate_team_in_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e909b5-88e0-4d0d-8dbc-292b6bd33336/nasikavevovu.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/71329077958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5c7fc9-aff8-43b9-980b-249335a0674e/curso_java_completo_gratuito.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_off0000c8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F7 5528 bytes
SHA-256: 44d306331f6869b79a1dca1eec506ef22246bd8887431c02120fc1b83015ee0e
font_01_sfnt_off0000dba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA1 10548 bytes
SHA-256: ec5665e8ace3ad9a73a37f773e1fe4187ed24d41cb365a3467d056d2e02ff1e2