Malicious PDF — malware analysis report

Static analysis result for SHA-256 54544a5cf9399fd5…

MALICIOUS

PDF

76.2 KB Created: 2021-01-17 14:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0c7e4e8964142e08a1e8269a90bbacbb SHA-1: a1383827e6cf28785f7c2ebd7a4ebbd5d30d538f SHA-256: 54544a5cf9399fd546d1c1d2fe7d48dfda1b48499eac1878b67f375202b133fa
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI, 'https://traffset.ru/aws?utm_term=nothing+holding+me+back+song', was found embedded within the document, suggesting a phishing or malware delivery attempt. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the presence of the external URL and the high confidence malicious verdict strongly suggest a phishing or downloader attack pattern.

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://traffset.ru/aws?utm_term=nothing+holding+me+back+song PDF link annotation
    • https://cdn.sqhk.co/teketerep/jpgiicT/digiday_technology_awards.pdfIn PDF document text
    • https://site-1177197.mozfiles.com/files/1177197/dasozuzelewunepe.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/v8jgQ5R/99417455202.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/OBjcsgf/88232412942.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/hbiBij4/zisam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500429/normal_5fb4caec809ae.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/lemefofutomapox/zukumed.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/basic_punctuation_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/vertex_astrology.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/48104760783.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/learn_python_in_one_day_and_learn_it_well.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/dujifowada.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/dc_metro_train_map.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/bell_bottom_kannada_movie_audio_song.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_off0000ed26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 5432 bytes
SHA-256: f9e92c4ce8f6bccc5ac5b500d62f5d32ab6442d1eadf0852cfff618e4647f5f5
font_01_sfnt_off0000ff7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7B 10736 bytes
SHA-256: 88c431d4e74ccd6b03966a67f68dd2361b12eb0136f596d61f4bb672532724bc