Malicious PDF — malware analysis report

Static analysis result for SHA-256 f824d53ce87d3fdd…

MALICIOUS

PDF

76.0 KB Created: 2021-03-09 19:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b4f303afa4e1086ea192e923ac29327f SHA-1: 9e1d8074d108f6684b958eba87097b5ffdc702b9 SHA-256: f824d53ce87d3fddb1816afd691e465a9952433f72ae00da0d1def897f72fbbb
96 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://mezovuduw.ru/aws?utm_term=human+anatomy+and+physiology+10th+edition+powerpoint PDF link annotation
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/zogot.pdfIn PDF document text
    • https://femuketidoxesi.weebly.com/uploads/1/3/3/9/133997502/3578714.pdfIn PDF document text
    • https://nutevozugunejeb.weebly.com/uploads/1/3/1/4/131483143/58d99d56d3b3.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/ae42d63fcba3e46.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/nuvukivaxiren/vokik.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/admin_officer_interview_questions_and_answers.pdfIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_f2a4b48d2b754c0ab1c7e614ec49e23d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajezife/3171189948.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/28302414042.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_f6a79b4fcb0e4aad980cfe2f1f8cb32c.pdf?index=trueIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_348fa223a1264113b9caea3c6f3522c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woberiz/26415057504.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/42340341945.pdfIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_facda21128494a0ea64d59549784bb04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/angry_birds_transformers_telepods_toys_r_us.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/unreliable_sources_of_health_information_definition.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_abb32e81264c49e4b1f0b0bce45fbe35.pdf?index=trueIn 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_off0000e9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EC 5720 bytes
SHA-256: 9218f54c2e3f043169bb2051b437ce998a39a657ae91d27c30f29a1aa655ddbe
font_01_sfnt_off0000fd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 10856 bytes
SHA-256: dff2f6e138cb230463dba9c97a69f8530de10600b349f36b4bb5c3fd6249a329

Open this report in the interactive analyzer, or submit your own file for analysis.