Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77caf4632eabec7…

MALICIOUS

PDF

42.5 KB Created: 2020-11-07 02:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 919740e430f10828d3e69850d6dab60a SHA-1: 175b9fc447d0191ff235b215a7658410b8fbab8c SHA-256: a77caf4632eabec740ece901fb96d3e09207834ff27a678ac08dee4b885ee53c
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/aws?keyword=msp+hack+2019+new In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f89d932ba640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f9942c91fff8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f8f3e5f97a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_5f9840d212027.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/towakog/4488353518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c17185-a015-4974-ba73-660906c00727/sizafegirokuzano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02fddc7-d8f4-4ed7-be98-5273039f243f/rusosasidaxugexoxev.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/56894979566.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/49630868334.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/organizational_behaviour_and_management_martin_fellenz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3395b1ae-af21-4f30-b592-e437c35d683f/dyson_v8_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a9159c-68bd-4835-930e-27867760b43e/nutanuzodabawakigilubim.pdfIn PDF document text
    • https://zefegize.files.wordpress.com/2020/11/31652374677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a3bc75-15a0-4fd1-9e55-4bfc31fa8a87/ronidapeladapofebuxiwo.pdfIn PDF document text
    • https://nufurunek.files.wordpress.com/2020/11/navumakuzixifi.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_off00006630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6630 5536 bytes
SHA-256: 19f20c999ba5ece1e3f5f48877c792662370fd3b6ae6e0b976adb2d343c577e5
font_01_sfnt_off00007925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7925 10676 bytes
SHA-256: 44ec99e1d43c8e4b177412b265265ce47cba737eab93313df5b1cc66a1fc62c1