Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa38ee57376c790a…

MALICIOUS

PDF

46.1 KB Created: 2020-11-08 02:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 80cb12095b37ccc40bd14308ef3caa19 SHA-1: d858886fc27501601fec922487e7628f5441593f SHA-256: fa38ee57376c790af40ec6674a502c216457be5e635307fa91a11d3d47f09e48
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=car+games+free+pc+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f8c994c3a965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_5fa729a9ce817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5f8e998f4af9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_5f9a579ac1c7a.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/zupenafud/sushi_express_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/wosagite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476e9d54-c5bc-4e99-9b75-d15ab4dbbac0/16342902552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e77abc3-95d3-44e8-8a17-9be47095d9ff/okuma_guide_select_float_rod_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/mailer_daemon_yahoo_failure_notice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/989ba276-3b72-4321-b831-c4f41ee98d68/tuzopas.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/equality_act_2010_scotland.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/proxy_site_unblocked_school.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/watch_a_clockwork_orange_free_online.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_off00007681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7681 5472 bytes
SHA-256: 47858e19b4fd1ab7c16fcdafec8e19c7f2875585899d6fbdf070b50ecf91f3d9
font_01_sfnt_off0000891b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891B 10216 bytes
SHA-256: 149e9ac1922ead776f48ec1e6ff8ae24735d1488114f57b030ab17b4f9726e27