Malicious PDF — malware analysis report

Static analysis result for SHA-256 9141e49726fecd3f…

MALICIOUS

PDF

82.3 KB Created: 2020-12-26 18:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: df2098642f261752a19a6f73249a8bdb SHA-1: d650a30c9c22ec5c6e7939248720c8f5365e94b1 SHA-256: 9141e49726fecd3f042d54606ef9edce61b49a0dbaf9ff1b84d57e8900afe864
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, exhibiting characteristics of a link farm. It contains numerous external links, including one pointing to 'trafffi.ru', suggesting an attempt to redirect users to potentially harmful content or phishing sites. The PDF structure and embedded links indicate a tactic to manipulate search engine results or distribute malware indirectly.

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://trafffi.ru/123?utm_term=collider+movie+talk+youtube PDF link annotation
    • https://cdn.sqhk.co/zafupusapun/ihgghdf/8616460343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_5fb273a9c2eab.pdfIn PDF document text
    • https://cdn.sqhk.co/wukibezoso/jhfhbjg/82515859841.pdfIn PDF document text
    • https://lovunekigip.weebly.com/uploads/1/3/4/6/134685916/84ce6dd9cdd9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f9eaf051ad44.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/bZgfhfP/fotivudix.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/TFgdigt/lemajotuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f904cdfea42e.pdfIn PDF document text
    • https://menebunokusup.weebly.com/uploads/1/3/4/5/134588819/1d462078d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5f9129f98aa8a.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/zgc5Dgj/75282640418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445534/normal_5fb9c364849d3.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/8067087.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/kizugokofo/day_of_the_dead_coloring_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/79408525503.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/inochi_ni_kirawarete_iru_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/47582682942.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_off000104dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DD 5064 bytes
SHA-256: c12453227b349e2a6eeff47d5f407ef64714e53c3795a08ef84eef114b7e821e
font_01_sfnt_off00011606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11606 11240 bytes
SHA-256: 70d72f41e408153bf9006848b3135f11584b4875b2f6c819bf7c68ce79e8a819

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