Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e70e5816f63c5d…

MALICIOUS

PDF

46.5 KB Created: 2020-11-04 02:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d32c66b6db5ef360a49edd9a858211c7 SHA-1: d6ba73a2250d01daae18dae032c6897c0acd732f SHA-256: c4e70e5816f63c5d8e80a569f6fa22fdf34b289868c103e354ba2ba06e5f6de9
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=jack+bryan+williamson+md In PDF document text
    • https://walutosewog.weebly.com/uploads/1/3/4/3/134312240/dubel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8818e05c648.pdfIn PDF document text
    • https://wamokanudetavud.weebly.com/uploads/1/3/4/5/134510572/budedumuzole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f93074775e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_5f9035c6e669f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5f96241a05eae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f99d37d07368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5f8b8158a9481.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/rujabepifar/68880749777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8007fe95-5a91-451b-af4b-73f4e2d3b281/22841563630.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/compile_and_run_c_program_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/72543625043.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/75424470701.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 5472 bytes
SHA-256: aaa5678e2225e46c69b6684ea30b7f67c01a0bca9dd8f6ddafb560cb8a62202e
font_01_sfnt_off000072a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 11200 bytes
SHA-256: 6787bf678d9b5b8b49cb0fe47bb5becea377f11e05f2a60b901e01be405fc729
font_02_sfnt_off00009837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9837 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995