Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c3faa1d972caad…

MALICIOUS

PDF

66.5 KB Created: 2020-11-14 16:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d76a396d5e3b114add94549e1a83e156 SHA-1: 17bad6e3bd8f6a44b90194489bcb6ff6e832efca SHA-256: 14c3faa1d972caad11b2f15f8bf3c69d4119556d5ec5ea43961db2ccaf146970
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it's part of a link farm or SEO spam campaign, potentially leading to phishing sites or further malware. The embedded URLs, such as 'https://trafftec.ru/strik?utm_term=administra%25C3%25A7%25C3%25A3o+nos+novos+tempos+de+id', are likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=administra%25C3%25A7%25C3%25A3o+nos+novos+tempos+de+id PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f893ffb2e128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_5f918de520910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_5f93ba03d383f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f8a52ce35c86.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/lejoxarokurixa_xerawipik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f923c97edcf7.pdfIn PDF document text
    • https://xesapexoxes.weebly.com/uploads/1/3/4/6/134633169/18942fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5f8ed993b9699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_5f8909cf0603b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_5f8f8ea43c644.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/radubozufiwo/dajavijixisebepex.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/fopigi.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/marcelino_pan_y_vino.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/xoxetewefizedoxokej.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/docent_definition_biblical.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_off0000c284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC284 5620 bytes
SHA-256: 595f9ca2d1b2702f8e1bb18880a2bc90b553f28a7963022a5d11434404194a42
font_01_sfnt_off0000d4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F8 12424 bytes
SHA-256: 84f285336068b2ace081afdd076961145ab267ffa2ce5cfef6e4f63d630bad64

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