Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d1183f26f78144…

MALICIOUS

PDF

83.6 KB Created: 2021-05-24 07:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2e6701dca1a566cac05642d13f489597 SHA-1: e2a8a9c61b793078b0ea98055189fc886a7a3c9a SHA-256: c0d1183f26f781447c54b7dd08d5d5aa878745e2bae31c1ce91490ee9709c5cf
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to seemingly unrelated PDF documents, suggesting a link farm for SEO manipulation or to obscure malicious destinations. One prominent external URI, 'https://zajinet.ru/strik?utm_term=how+to+install+beat+saber+mods+oculus+quest+2', is flagged as suspicious. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of numerous external links and the ClamAV detection strongly indicate a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6753

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://zajinet.ru/strik?utm_term=how+to+install+beat+saber+mods+oculus+quest+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407781/normal_6034dba605253.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fcac244bcf58.pdfIn PDF document text
    • https://gisafonenum.weebly.com/uploads/1/3/5/3/135323636/b311c759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449185/normal_5fce707f1851c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5ff0753746516.pdfIn PDF document text
    • https://tesiligozi.weebly.com/uploads/1/3/1/4/131407846/tanefapot-jewolix-lekutolupi.pdfIn PDF document text
    • https://gapidekejoz.weebly.com/uploads/1/3/4/8/134876705/e77ffeca.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/widofafane/4_pics_1_word_level_2245_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/fanamojijuwenasebasatitip.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/benefits_of_information_technology_in_agriculture.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/jet_18_inch_bandsaw_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/chasma_laga_ke_nagpuri_dj_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62e23a6-3ef8-472d-9e86-c8cbd8e47d52/15501976995.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/how_to_prepare_income_statement_for_construction_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebcf313-95a1-4acf-a813-fe8d81e63f47/bipetizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7eb18b-fdaf-4f7f-950d-db11513dd576/dotokef.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/55734457677.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/cms_report_page_online.pdfIn 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_off000113fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FE 5420 bytes
SHA-256: d20206581c94b18c44a8096e728431d349170af6b5bf7b62ed411347e41b1704
font_01_sfnt_off0001264e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264E 11916 bytes
SHA-256: b8a7949853f6b8b7550bede33356b11982c3a6b95baf11ccf575e46aead8688f

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