Malicious PDF — malware analysis report

Static analysis result for SHA-256 52836b8a34245f17…

MALICIOUS

PDF

54.5 KB Created: 2020-12-05 04:36:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 654600915df1e5275cf1c177cf76a105 SHA-1: 8c66d3c06a47944994b37693f184c19a86ec1b8e SHA-256: 52836b8a34245f179fde0a44a4ff7a98ad196ac190ae987557d9edc1a6e4e10a
212 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The ClamAV detection and ML classifier also indicate malicious intent. The document body is heavily obfuscated, but the presence of the URL 'https://gettraff.ru/strik?utm_term=robe+of+needles' strongly suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7192

Heuristics 4

  • 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.
  • 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=robe+of+needles In PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_5fb035b4649b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5fb4b22bd9612.pdfIn PDF document text
    • https://lafofawevomu.weebly.com/uploads/1/3/4/7/134770087/9893659.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/vatunomawuwog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489994/normal_5fbd0e203b0bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fc52ed64445a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5f917b03d7a95.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/megelugik/zulaforez.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/ccna_v6_chapter_6_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/33999102216.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB279 4740 bytes
SHA-256: 9844f21a78a5c4b720f882caad41ec2c762004b159d3008510c65604b194bd93

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