Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b578780bd9e9df…

MALICIOUS

PDF

69.4 KB Created: 2020-12-27 12:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 589673d64db2c8ac2f65d26364945a83 SHA-1: c1f4a6646d80475a7615a3f08437d70e071f0bed SHA-256: c2b578780bd9e9df7b9143e584fb90d4204bd32d542d3e22bdc46ec3f8eb7b00
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are part of a link farm designed to manipulate search engine results. One prominent URL, 'https://ggtraff.ru/strik?utm_term=simple+cake+designs+for+baby+girl', is identified as a malicious redirector. The presence of these links and the ClamAV detection indicate a phishing or redirection attempt, likely to deliver a secondary payload or lead users to malicious content.

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
  • 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://ggtraff.ru/strik?utm_term=simple+cake+designs+for+baby+girl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f927e0821208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f99a6257b08a.pdfIn PDF document text
    • https://dajepulexito.weebly.com/uploads/1/3/4/5/134591334/sogaz_nojubalum_teboxasor_zipipegigud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5fcba345c0a13.pdfIn PDF document text
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/5296151.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/sodokazid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f8db800983fb.pdfIn PDF document text
    • https://jesokawafaz.weebly.com/uploads/1/3/4/6/134626724/sufeguzazoxamikelop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5fb716a455b5f.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/da1d2ff0-e718-4e36-b3fa-20dc1eb9afcb/53921684823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0995c39d-4899-4c1b-9bf7-1fff51c77932/zogewusiwunepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14184fc7-a361-4464-a848-2aca3b1a2094/59956685949.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_off0000d254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD254 5884 bytes
SHA-256: b3662d375462dc8c728cbb3419e4813ce81da9b3d0c4525e9ada1ab1a7de6c0f
font_01_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 10184 bytes
SHA-256: 5add4eadbe194d8c4a232803e697cf4ffa621f5af01fe172cbf006dc97e380f6

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