Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e70650cf955ed29…

MALICIOUS

PDF

69.1 KB Created: 2020-12-30 09:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e27172fae330a38db1c4c7b160203bc3 SHA-1: b210127d34bf28e3cd0b874e5f86beb8d2da8609 SHA-256: 6e70650cf955ed29b88ebc3e889d354afb22e7263dd53ef98e982d961f59b400
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/strik?utm_term=knights+of+ages+classes PDF link annotation
    • https://palifeselaliku.weebly.com/uploads/1/3/4/4/134441248/fofuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_5faef708ea400.pdfIn PDF document text
    • https://cdn.sqhk.co/wolitobutak/hdhbeEE/xarokitopivalafadarufisa.pdfIn PDF document text
    • https://gabinomila.weebly.com/uploads/1/3/4/7/134763369/dakeditewidinag_bunixudewa_tovovotala_jefokuxagebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_5fe7db1fb6cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490739/normal_5fd5f5833762e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445104/normal_5fbd7ce7b94b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388156/normal_5fdf63e4dc962.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/lekelepowo/cheerleader_uniforms_cheap.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_off0000d187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD187 5016 bytes
SHA-256: c4a893d6111e65d9b755a9f29efdbf3d3c6fb53b7c1d242b5c64e8f5b8537365
font_01_sfnt_off0000e2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A9 10948 bytes
SHA-256: ae811d0e9a6f6796002516ff5b03eb0cdb0f3247c9edccf6e264c841d27888a7