Malicious PDF — malware analysis report

Static analysis result for SHA-256 771092d5e385e8d2…

MALICIOUS

PDF

73.0 KB Created: 2020-11-24 10:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 80c060af59f91be2e7ebfdbe91291eba SHA-1: ed4dddd6caa276fb386a0e98a7f6b971b7baae31 SHA-256: 771092d5e385e8d2ba9c8efd861583edd260111752c69333a6a52630eb86dc11
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs, such as 'https://gettraff.ru/strik?utm_term=medieval+total+war+download', point to known malicious infrastructure. The document's purpose appears to be to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/strik?utm_term=medieval+total+war+download In PDF document text
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/493898.pdfIn PDF document text
    • https://xujupemixupu.weebly.com/uploads/1/3/4/7/134745759/197726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408001/normal_5f9bfe6023ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486522/normal_5fb96f4adfa0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_5fb40f65c5db4.pdfIn PDF document text
    • https://dadixuva.weebly.com/uploads/1/3/4/0/134018012/4449865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fbc88c75848f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_5fae7f1705287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f886f0a31930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453889/normal_5fb74178b5a8d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 4800 bytes
SHA-256: ca5369e52037c034ba11ada4ab463a2e486d20b6d28bcfb1e0ec710c1b7be7bd
font_01_sfnt_off0000f389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 10492 bytes
SHA-256: 22fb96bed7613194a69bacdc825f29eab22992f467ac785e5a8c660f232eaf7f

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