Malicious PDF — malware analysis report

Static analysis result for SHA-256 049c63f1bb92d465…

MALICIOUS

PDF

116.9 KB Created: 2020-11-10 10:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3e075597098d908c04d2530c3de9ee5d SHA-1: d8c53603af26e48576814ee4ff438284555a9cb4 SHA-256: 049c63f1bb92d465826aba9e141bdceb212e7691c72e8f00ede7af774e62124a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' and the presence of a URL containing 'strik' strongly suggest this malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm indicate it's designed to drive traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/strik?keyword=marijuana+plant+growth PDF link annotation
    • https://lugafowak.weebly.com/uploads/1/3/4/6/134647172/7e05836080058a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f96d523cfb66.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/9f9194124b1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416316/normal_5f9d00265c681.pdfIn PDF document text
    • https://minikugonon.weebly.com/uploads/1/3/4/5/134500064/kevopaw-zizufixudebawoj.pdfIn PDF document text
    • https://detalejutapebis.weebly.com/uploads/1/3/4/6/134610814/ratapidexes-kefafaxajomusos-kositovewotot-liniwes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/846c1302-27c0-4e07-aebb-4073f82d707e/bukojofapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9a822b-e981-4e3f-ae49-aa587d3c43eb/john_woodens_pyramid_of_success.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/buzuguvoxuponoz.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/13346035903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/923530d5-78f0-40c2-860c-a1826bac1640/mozapujurobisenovuvatuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6c9085-60aa-4f26-af9f-04d55c3b1ef6/gobedebunobipefiruxo.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_off00018dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DC7 5076 bytes
SHA-256: dde816d1e4560d7cd2e765b086628422e9e2849327599a8313af614b6bc427ac
font_01_sfnt_off00019f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F23 11576 bytes
SHA-256: de254b353817386f95c7324aac61693e0d06a8df9e39be42dc0ffbb8e79ca479

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