Malicious PDF — malware analysis report

Static analysis result for SHA-256 443ca76ee583818b…

MALICIOUS

PDF

42.7 KB Created: 2020-11-06 16:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 35cf71126f76c354b92028d82b7e062a SHA-1: 84330b60a25dde3f669bb478a76eda8e7e2fe7b4 SHA-256: 443ca76ee583818b12273d4c046f6b0b27046bbf2eae9be3ee24d7bb579f57c9
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are part of a link farm, with one critical link pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for movie downloads, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffmen.ru/123?keyword=scarface+full+movie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f8a8da37052e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f92a56c483c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f878e5a06612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_5f95aa3c2efbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5f8fe0afd2a96.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/zoroxov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f87e0702ac09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f86f83296ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5f99ce2a0cec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f87f054b5a3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/gopiv.pdfIn PDF document text
    • https://xupuzen.files.wordpress.com/2020/11/dijewajipamojafupojim.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/sagob.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.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_off00006b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5A 5012 bytes
SHA-256: 298bd156eadd6cc3d22835cf24d38f2420c04a4ae9962e75188d6f170f83d3de
font_01_sfnt_off00007c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5D 9876 bytes
SHA-256: 3d6799d9a4a4f81bc933c09f49cfcac4159034273ad78e747b789ece0c1b6120

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