Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f3718d378853df…

MALICIOUS

PDF

49.0 KB Created: 2020-11-01 10:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5643ba7e994932e663786521291452b4 SHA-1: 2576a6566b987fcd26181c74425e1a11215cb66e SHA-256: 94f3718d378853df902a33d5306d7a3fa8f3a7ea85181dcd39e254aac29ced67
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/aws?keyword=is+buying+cigarettes+online+safe In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/mipasaso_rijulikomabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f94faa82f0de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405639/normal_5f92362e4628a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5f9d5afcdf294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f8b61633d9ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f9459bdf2aae.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/a0b19c12-8095-4e8e-a32a-9ca780f37d46/9938168195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9368/6945/files/2_samuel_8_esv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/4626/9613/files/zivesumetiwojodiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f265c9df-6129-4919-bdb1-3e36e0fbcd29/18431358402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2469d421-be10-40bd-a093-191d04fbbb5f/zoo_tycoon_download_animals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/156c9b93-416e-409f-8fd3-a6b085322d76/lerukereteneza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bfe1232-a61d-4384-9c3e-e55a4a23b86f/block_craft_3d.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_off00007ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF8 5228 bytes
SHA-256: 0eb01831c22e46be54a216372d39d293402bf911a63be2d267c023e4641f6854
font_01_sfnt_off000091e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E1 11000 bytes
SHA-256: a7fa1d2f27412349baf01f3ea8c80576b5268894fcbaee009cccaf744637a651