Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdec7ab0c640dc5a…

MALICIOUS

PDF

64.7 KB Created: 2020-12-31 20:12:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 77be9baa3d6658abf66b8e6bd54aa1f5 SHA-1: d600558e5c836f683d23801d81f7cc873cedd521 SHA-256: cdec7ab0c640dc5aaee9d9a308dccae34910e7cd356a9aeceaa0a458349daf5d
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=sony+walkman+radio+headset'. This link is likely intended to lead the user to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing pretext.

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
  • 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=sony+walkman+radio+headset In PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_5fad6b38bd081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5f8d3fbcbd123.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/RrFPhjp/viral_agenda_event_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/iadNahb/top_50_petroleum_engineering_universities_in_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/Tfum1zd/52146487644.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/giyaRVW/kakawemifunuz.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/mijedusovineti/eye_of_judgement_psp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53d9511-e68a-4a75-bfca-0e1381f69e03/99437048816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f93e8ea-1b93-43df-88a4-95d92a7ef568/eva_notty_new_porn.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/new_movies_free_mkv_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3374ce10-eb38-4e67-8726-c3fa22d5d905/fovelukebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b2dd6b-dbb2-4ece-a985-540a9f3ef9cd/37695721713.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_off0000c049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC049 5428 bytes
SHA-256: c896ee856b36609bc75d9660fc739263ea044d3203fbf92aa31b91e468144cf0
font_01_sfnt_off0000d2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 10500 bytes
SHA-256: f0ab00dae675ea77ec6af469f7ab88c450446ec52a577aa8878044ae59474bdb

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