Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1994b128017b2f1…

MALICIOUS

PDF

54.1 KB Created: 2020-10-20 23:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 888201b7b123630a6478136fbf51f989 SHA-1: d30d47176ec7583941fa1687ec972c3672e460fb SHA-256: e1994b128017b2f1374032bfe5563db70870d1e6a40776e3f3dd10dec5efcbaf
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=format+date+in+bi+publisher+rtf+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8763fca6f74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f8c2c45a1b9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f8b1fc39e020.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/4836338.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/kotawuzo.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/rajutojuxo.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/9085281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7327/2996/files/lepijemulijiwaxis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/rarumegegevemilusiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/fipawor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cee51c9-9800-43d6-bff3-47a5f4b6cf99/manuxodopufofogisisopamin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15227bb6-abc3-4f71-aaa4-2a994cf5ba70/busipijexoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4be8088-447a-4381-b3c4-ad8b05c702fd/75682256909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a913b649-99f2-4119-a614-c7a4deaecd60/96244220229.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/50712536583.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/67401781344.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/xegabizuwapubonoz.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/85353999664.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1B 5256 bytes
SHA-256: ad3ac4b02aa80db2accbe78f0bb49cc61443c9559acab8b2d167dd9bdaa6d74c
font_01_sfnt_off00008dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBB 15044 bytes
SHA-256: 5afcc58199296ae1608bf92def8ae5cd1447a41e9b3d22ebabc029628aab3b50
font_02_sfnt_off0000bca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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