Malicious PDF — malware analysis report

Static analysis result for SHA-256 534ab63137177838…

MALICIOUS

PDF

47.8 KB Created: 2020-11-07 18:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5fce2ff9094eba1d981a112f1550d8d9 SHA-1: 7267cb451655098fc1032f18348794b29a6f1fb4 SHA-256: 534ab6313717783847f3620ffc2b876fd720cec4f602a62a92486f8d2c0a41dc
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely intended to lead the user to a phishing page or a malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/aws?keyword=famous+bobs+pizza+evanston In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f8e3c8e92368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_5f9e087831ce6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/napew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11907ef-8a0e-4bb7-b17c-9ae1ff5d9692/pixazubepojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acec339-66c9-4998-b013-78219e064232/54898196090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5026ab-17b3-4e3a-8400-c3b9137faa3d/2940949687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9e5149-cc22-4b7b-ba22-54f7c276d135/sagujuwofar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a336f4d-1976-4f22-9461-c75f85ee8ce9/fabixokuz.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/outback_vision_protocol_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c3d6c15-c182-4f02-ab2c-aaa0406b9e37/84645674035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15a52b1b-8ee7-45af-afd3-38339ea97ce7/somujewivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff4bbf19-c7e6-457a-8d3d-72220900fc22/69261343604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ff9f2d-9613-4682-8b96-8f6530236b0a/comptia_cloud_certification_study_guide_exam_cv0-001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51737f0c-e557-4fb1-8cfe-548b8a2e7bf0/makowuvod.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_off00007c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C11 5040 bytes
SHA-256: b9276a8839f26bfba36b6a7d5d0f3332966ad580ce9f629807566b4552228d48
font_01_sfnt_off00008d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D33 10924 bytes
SHA-256: 2061cc38ec1474c6b921f9330180eb2b0a69794650695fa0b9e9497fc216e098

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