Malicious PDF — malware analysis report

Static analysis result for SHA-256 41795fd9fc8bfdb3…

MALICIOUS

PDF

73.3 KB Created: 2020-12-29 15:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 142cfaca5471be29fa2b553dccf14cb5 SHA-1: 707d21c027dc7e4821db0b8e025521b5f44c87e9 SHA-256: 41795fd9fc8bfdb335503e9797ee374591255fce2428a3d86db4e243f8937134
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain a lure related to the Rugby World Cup. The presence of multiple PDF links suggests a link farm or redirection strategy to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=rugby+world+cup+winners+2019+pictures In PDF document text
    • https://static.s123-cdn-static.com/uploads/4370286/normal_5fcb390d0a9c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443595/normal_5faf7f41059ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f9e8c64ee6f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5f8ed54e3908f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402933/normal_5fbdde5eb98c0.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/tojetefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5f8fa3479b96b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5f8df96c23b84.pdfIn PDF document text
    • https://nudomituge.weebly.com/uploads/1/3/4/6/134677479/bibajeve.pdfIn PDF document text
    • https://jikevumuvovidu.weebly.com/uploads/1/3/4/3/134324483/4801308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5f8edf6ddef9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f8a25668fe88.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/e92326b1-f8a4-4d3d-99b6-c26860aadd91/zijagi.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_off0000e060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE060 5856 bytes
SHA-256: d03678483f0b4d8ea68f969df7b7a3250175958b7d639c127c7a594a6a040da7
font_01_sfnt_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 10512 bytes
SHA-256: 2a5c641bce34f62f1b55346256ae7f17fbb7d2b6535a40ec105b674852fec00b

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