Malicious PDF — malware analysis report

Static analysis result for SHA-256 821ad43bce515185…

MALICIOUS

PDF

44.2 KB Created: 2020-10-30 01:01:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5ebdbad118f03db91e2f1311b48616ff SHA-1: dce07212f5597ae39e150dd46353a305f464de7d SHA-256: 821ad43bce51518590e65398605a6f87503d7dafc98b8394df926473dc0ca2d9
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/123?keyword=madison+wi+streets+and+recycling In PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/4d6487.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/dabuwosevitumiw.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/rafanotovi-duvibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f946fb31373f.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://s3.amazonaws.com/jepinebawo/wejaluzozukojuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a418a5fd-221a-424c-899f-ede1252168d4/28071547908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b0cbf2-39c7-4658-9506-5a1283950b14/17066435350.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/metodo_biopsicosocial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02af26b5-8ef4-4f18-91b1-3c91095321c1/wkbn_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/fesip.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_off0000612c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 5092 bytes
SHA-256: 04e5a6bdc3c7486ac3f0b3bb4423b66aa95cdf0d1aa10f0557ab70cd40e01de4
font_01_sfnt_off0000729e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729E 10268 bytes
SHA-256: aa458fa547ef37ff0adc524389a0d5055c4b17cc1111e737f42988a770b3f7a2
font_02_sfnt_off000095bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95BC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34