Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a55fc06a939cca0…

MALICIOUS

PDF

49.0 KB Created: 2020-11-07 21:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5e561eb1d2cd628379deff0001c39024 SHA-1: d8eb88b9ac8a60586103f1051bb4648e68484bbf SHA-256: 6a55fc06a939cca0d7c7401be48cef7b0c76b3eacf1d2f1f2bae7a069eecac83
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 1.0000

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://traffine.ru/123?keyword=party+planning+committee+duties PDF link annotation
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/womakofataxope_domupagukujorip_xufepagofaluda.pdfIn PDF document text
    • https://xakezoram.weebly.com/uploads/1/3/4/4/134497816/xivesoramefera_lubudituwoka_padotu_dejarivo.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/poralizetugit.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/tetenifeme/laxokof.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/injury_incident_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5607e3-f5be-4297-9972-5d4c36aa5e6c/xudonararude.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/xadikosize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c8eec6-6e57-4629-93db-7089b6848528/rusakoveluvimovub.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/51006471715.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/kodusif.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/mugutami.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_off000074ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 5376 bytes
SHA-256: faea6475a8d8706590ad06f0861e6e190c011eaf293674df9881d40684c7ef9e
font_01_sfnt_off00008729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8729 10092 bytes
SHA-256: 81259271af7c9c3646d6cb040c386f9693c2d6b92b40e9d1fd744216edfda5ff
font_02_sfnt_off0000a914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA914 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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