Malicious PDF — malware analysis report

Static analysis result for SHA-256 132ea60cb7a2a81b…

MALICIOUS

PDF

68.6 KB Created: 2020-11-20 11:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: aff7cd344c0a2234797d1d6216853725 SHA-1: d3ac1a831c267e62335adc327e7d959f92ee702e SHA-256: 132ea60cb7a2a81b6aff982d0eac494f29efaade6ed5382b04d7f4242481dec6
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a link farm. The primary malicious URL, 'https://traffking.ru/strik?utm_term=texto+instrucional+com+interpreta%25C3%25A7%25C3%25A3o', is flagged as a known malicious redirector. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector strongly suggest a phishing or malicious redirection campaign.

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
  • 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.
  • 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.
  • 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://traffking.ru/strik?utm_term=texto+instrucional+com+interpreta%25C3%25A7%25C3%25A3o In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5fae0f3bb3461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f88497639b9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_5fae5149d8712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_5f9d0ffb4998d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f906a07db63d.pdfIn PDF document text
    • https://kutepazibug.weebly.com/uploads/1/3/4/4/134477769/wodafoziromusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_5f973a42f147b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_5fa8974fbaa21.pdfIn PDF document text
    • https://kozikimonewuzo.weebly.com/uploads/1/3/4/5/134592445/wenibib-duvaxeva-gifive.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/jefobexapulow/72729405077.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/different_districts_in_san_francisco_map.pdfIn PDF document text
    • https://s3.amazonaws.com/nazezawovi/easter_egg_clip_art_border.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/kinds_of_adjectives_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/giwabamixoresujufasanofup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f001f71b-5a7c-4e98-9222-2c0f425acbec/minecraft_naruto_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/sports_basketball_championship.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_off0000cb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB90 5596 bytes
SHA-256: 2056dcffdab648d0057f6d720a595068c331525aafbbfdfeba6aa080fd404ef0
font_01_sfnt_off0000dda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA9 12212 bytes
SHA-256: 8663ee83e5e06c113523da6cf19d1da7f4af82b0d086f1880cbae893cb54bddb

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