Malicious PDF — malware analysis report

Static analysis result for SHA-256 5531f037d9e96d5e…

MALICIOUS

PDF

39.9 KB Created: 2020-11-04 04:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0a0f0085b230254d2ef7c754b00f8273 SHA-1: 23acc2795e4655d138d58570e58a53bf038b09b0 SHA-256: 5531f037d9e96d5ec2bd7a75f7836014ba20c62e25d721324993f3fd92f715f0
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://gettraff.ru/123?keyword=old+classic+arcade+games+unblocked In PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/naxurupeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f8f3da023bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_5f9b36642d604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5f94d29c024e0.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/4096223.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421329/normal_5f9f37dcbb8cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f93292a0d0b2.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/2379673.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/261fc78b-6dae-47d4-8de5-28d750b98b97/61728972470.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/how_much_do_braces_cost_a_month_with_medicaid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b679ef-0b54-4cd3-8622-806584cb044b/31623537842.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/little_johnny_jokes_for_adults.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_off00005b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 5492 bytes
SHA-256: b078a63993755d45d6191f9debc55568046ed0dcc831ace076574f83c7267b84
font_01_sfnt_off00006e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0F 10956 bytes
SHA-256: 8d963d9c64dcb8d1898bb54dd0954a888cbe90231df3a1034a007d5152391d13