Malicious PDF — malware analysis report

Static analysis result for SHA-256 f996cb2d969b9b33…

MALICIOUS

PDF

45.8 KB Created: 2020-10-29 18:35:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 863be918b7efea1573b4e91ae8deaca8 SHA-1: 5ca918a1c54f7c5c93e992fa9d0d9826be85c5c9 SHA-256: f996cb2d969b9b33a9b87369ea127d1be245143fdda3bfeab156894f56fc66b5
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://cctraff.ru/strik?keyword=aiag+manual+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_5f9a814f471f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f8db96b3724f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f99dcf041af6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_5f9adecf4a9cf.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://uploads.strikinglycdn.com/files/9012c117-7caa-461b-9a5c-4917762fecca/nudogijesenixarenumaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/xakaxumalozonujukik.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/amar_chitra_katha_new.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/equivalent_weight_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bfc8004-98ae-45c8-8a84-57f899df0808/libro_de_informatica_3_secundaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfb3c89-200d-410d-bf89-e5a038c4ab7c/blank_number_chart_1-500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5512e7ad-8e75-4bef-92c2-08d6b6596ce4/99660654192.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_off0000664a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664A 4932 bytes
SHA-256: 97200dbaa81084b7342bd355b455e8897e76442f998f62777c4d2402850352cc
font_01_sfnt_off000076ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FF 11332 bytes
SHA-256: f8231729fd547ae6d0835e84e7911775db734cbd1155291cd918b6af05eba04a
font_02_sfnt_off00009cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2