Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe00697e93a2b431…

MALICIOUS

PDF

47.9 KB Created: 2020-10-25 17:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbcdb66d14962f0635d4e3a28f362a3 SHA-1: 1e1d5387c391a2133bb340519eb6b46b63f64fe2 SHA-256: fe00697e93a2b431c2ba9bcefe8b27d89e84ec0c93ffe9be6bb97ee85141f1c3
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, likely intended to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links further indicates a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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://ggtraff.ru/aws?keyword=diagnostico+de+anemia+por+deficiencia+de+hierro+pdf
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f8ad4530b504.pdf
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f87d13ae6fb1.pdf
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f91982ddc600.pdf
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8744575a5d5.pdf
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5f8c77302e20f.pdf
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5f9573710e5c1.pdf
    • https://cdn-cms.f-static.net/uploads/4383806/normal_5f8e1b7e7839b.pdf
    • https://cdn-cms.f-static.net/uploads/4390382/normal_5f952cbbcef3d.pdf
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f9102444b631.pdf
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f8d359029b9d.pdf
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/pebabaxopurode.pdf
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/2670979.pdf
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f91191cd4042.pdf
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5f87750fa386a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zedilegol/22817083984.pdf
    • https://s3.amazonaws.com/tetazino/53213321918.pdf
    • https://s3.amazonaws.com/subud/wasema.pdf
    • https://s3.amazonaws.com/memul/histologie_de_l_appareil_urinaire.pdf
    • https://s3.amazonaws.com/henghuili-files/articles_dfinis_indfinis_contracts_exercices.pdf
    • https://uploads.strikinglycdn.com/files/0e0841c7-1e88-47c7-a49d-a598d9270c34/gafatinamulobojatozuwel.pdf
    • https://uploads.strikinglycdn.com/files/bdde25e6-00f1-416f-8f41-02be6775772f/78590002398.pdf
    • https://uploads.strikinglycdn.com/files/d7e2aa6d-d8d7-4e75-bf4b-28cf21da84cb/lufan.pdf
    • https://uploads.strikinglycdn.com/files/a6b1bf65-3c67-4c2a-b77b-02264e1bdc3e/roneza.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b1d.bin
08cebe8e6b0bf5911888e5c8d16f3a14f09f8bf39a98082191caa6ea6cf06353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1D 5536 bytes
font_01_sfnt_off00008dc6.bin
8e63514599d3fca24990e7dcb7e692724f49d36eb735e4b0b8bba782ef0d4c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC6 10996 bytes

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