Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebafabc1978e8268…

MALICIOUS

PDF

66.6 KB Created: 2020-11-20 14:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d07bf9b94087d099a794d31d28f05e47 SHA-1: 782690f0fe36333a4a56c7b6d3a34161c912a936 SHA-256: ebafabc1978e82681d22df2f9fe5f1179d0d793e5d4b80346a4390ec264030b0
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 'https://cctraff.ru/123?utm_term=dsc+neo+user+manual'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also flagged the PDF with high confidence, and ClamAV detected it as a phishing trojan. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

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
  • 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=dsc+neo+user+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f88dd129d4ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f9bb86b152f3.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/619a1851-4429-4fb6-af27-e4a968b13332/american_revolution_reading_comprehension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9878931d-0978-45ee-a5a1-8747dcb88ac4/suzopirekuvebidorinux.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/vuwosezatezopizegef.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/18851847597.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/malwarebytes_anti-_malware_gratis_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/girogujiboxiwuzun.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/triceps_gym_workout_video.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/ziverexokexewosuvula.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/25276851873.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_off0000ca2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2E 4944 bytes
SHA-256: 65fc2fc1d91eb2f9f2985ec88a1eb17d30c7263750c633a86cc8151f2d709367
font_01_sfnt_off0000dae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE8 10152 bytes
SHA-256: f8eaefe3f9e4c214b04e8690f0861a82cab74b7b69eda521391f12f35ac56604