Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1333b4aae1104b…

MALICIOUS

PDF

87.3 KB Created: 2021-03-10 13:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3fae97fee4a11d54a0edce802ff54f45 SHA-1: 36e9c2145ccf7afef66005a0785ff991ba4b278e SHA-256: eb1333b4aae1104b697f553caaf2599792a5a94b2c8f8f7ba8e3dfcc90df0d15
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files, suggesting a link farm or SEO manipulation tactic. One primary URL, 'https://xezojetit.ru/wix?keyword=cameron+diaz+body+book+pdf', is presented in a way that mimics a search result, likely to trick users into visiting a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

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://xezojetit.ru/wix?keyword=cameron+diaz+body+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484097/normal_602c12a0ab22e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383314/normal_5fdff96e054b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_603865bacebad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_601af9d622ae2.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/sexilag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_5fcdbb0081de6.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/ijbtjhX/bunny_pop_game_download_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483072/normal_5ff4d8c088a2c.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/if2haML/knife_hit_2_download.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/bjdjer7/word_swipe_pic_app_download.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/luwiwuzirov_wisubaparalopo_rosopilerafu_kusinujurinunes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_5fd0b1fd6d22c.pdfIn PDF document text
    • https://cdn.sqhk.co/fidakasari/uSn44hf/67121675275.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/IhgswG0/78205802168.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/CNhgihq/tasevasasapitosuputexu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvelexadaw.epizy.com/free_printable_paper_bunting_template.pdfIn PDF document text
    • http://roxanotox.epizy.com/wilderness_survival_tools_list.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_off00011a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0E 5236 bytes
SHA-256: f8bf59ac4533d80eeaceb28518e62e9b80cab2eca93dc71e3a8eb8bf8a03f395
font_01_sfnt_off00012bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD7 10688 bytes
SHA-256: 8874a5c72544c13388ff72f6dd3cbb47be3a1ddfb8cb8b0f042f64fc2c95f685

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