Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b0fdc14e2bda09…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 14:31:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec7c9a8f3b6ad2a80b6ae8c041e0ca05 SHA-1: b689cd28a4885ee1487e2917740693fdb8cf00bb SHA-256: f0b0fdc14e2bda098a0e8aa512b0616773ba10fc6a8bf31799ae5acf782181b8
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The primary external URI, 'https://soxebez.ru/award?keyword=biomedical+ethics+degrazia+pdf', indicates a potential phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9707

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=biomedical+ethics+degrazia+pdf
    • https://cdn.sqhk.co/nuvaratuji/jiiczhf/line_puzzle_string_art_level_60.pdf
    • https://cdn.sqhk.co/fatepotax/jbhg8ha/50843267040.pdf
    • http://moreprodukti.com/kozinejolezarowovb197.pdf
    • http://vodoroding.info/medical_surgical_nursing_book_brunner_suddarth8afjc.pdf
    • http://com-copyrighit.com/zappos_core_values88ntq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_7b14030a52a44a9fbdd0983a50b90a0f.pdf?index=true
    • https://s3.amazonaws.com/viregujipowuru/76649108165.pdf
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_cc5e33c715024882907611392812f2b4.pdf?index=true
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_7aa1eeeddb434720b0a9522171300347.pdf?index=true
    • https://s3.amazonaws.com/satulibaren/museguvaxasibajumedezifi.pdf
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_1a0c6a4ddb6a4af59279cc3be28cba24.pdf?index=true
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_f2d3af4929f54d5f8e07bf56969ced0e.pdf?index=true
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_30bb5b44ccd0483eaf9c8525a53da527.pdf?index=true
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_da6f59c6b5e64b9189e44077a231d739.pdf?index=true
    • https://s3.amazonaws.com/tuzamada/36543837550.pdf
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_7b38ee13c779415cacc2c33a1ba147bf.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f790.bin
1b2e4ca38c38539b8401d0b964dd131e8d7317b7eba8860f3342f50a9b57d87c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 5348 bytes
font_01_sfnt_off000109be.bin
867c679fb97334661a4ed8ea919cf4db05ad65900ef65786a6037aff026fcbc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 11692 bytes

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