Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db244b62a32d00a…

MALICIOUS

PDF

64.1 KB Created: 2020-11-04 08:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4fefdf43ce180270c54c616490cfca0c SHA-1: d8b15647b443e71ba4960644f3514c507ee59672 SHA-256: 5db244b62a32d00a737de7fb0540014ca85c1c15bd9370c9547003b63611b553
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/strik?keyword=instaketo+reviews+and+forums In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_5f9e773a3cb03.pdfIn PDF document text
    • https://xekixudag.weebly.com/uploads/1/3/4/3/134336078/95471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5f99f797f18a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_5fa24e0f23d33.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/zerepuzuze/queen_mary_jackie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/82442974080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aef2de6-1bd0-4c55-95ad-7d908547e878/hidden_history_of_detroit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8eb8f22-9973-4cd8-b87f-fb68981000a0/29775707066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ade20d6-2ee5-4357-a12a-1e7c4ecb0a69/jiub_s_opus_page_8.pdfIn PDF document text
    • https://s3.amazonaws.com/pezufatexo/20427540603.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/zafinuwajowebir.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_off0000aefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFC 5056 bytes
SHA-256: c49e2f02d1b343f20c7772fc6889914a26c9e290b9a8b634842142e8b9fee744
font_01_sfnt_off0000c023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC023 10936 bytes
SHA-256: 63c82e7cc93df702cbf4231acd14034a19240d61bfd5e785d10938d0157ff603
font_02_sfnt_off0000e589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE589 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e