Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e44b227f11c0fa…

MALICIOUS

PDF

67.0 KB Created: 2020-11-20 06:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d5719a61c090b900b685a5afc1a393d8 SHA-1: b99224b97d76aa6435c3de20ca302cee7f378214 SHA-256: 52e44b227f11c0fa47fae0714abb37050d12d42dec473adcbef45663657df23c
154 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'Stanley coffee mug uk' offer, which redirects to a known malicious URL. This suggests a phishing attempt to trick users into visiting a compromised site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/123?utm_term=stanley+coffee+mug+uk 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/diwitapezu/jurnal_atresia_bilier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf051d7-3bbf-49b2-a3ab-df2afd79185e/unblocked_games_vendor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298c72bd-862c-4f26-a998-35451d091e59/jogabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561073ed-dee8-43c0-8f71-033a3f46d019/44722523738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff20686-83ba-488c-bd70-c280d9d94773/81425053675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aec51cb-7b92-431e-9704-895cbb6e3a85/fejalodepamadejexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0259d424-cd24-4b0b-ab38-f99c1444c33f/download_freeairbrush_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/sql_interview_questions_and_answers_for_java_developers.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/teachers_lesson_attendance_register.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/jupifixaj.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_off0000ca41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA41 5196 bytes
SHA-256: dc1d36acbde1e2734a59dba7135533a4df32bbdf826a2e88c38318e879853870
font_01_sfnt_off0000dbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFA 10864 bytes
SHA-256: 3b8f3e1c5d3ca92a8f2c653699a7aea3a0bb55a243a262b34d05d8030feb22b5