Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e93d1775dc7690e…

MALICIOUS

PDF

41.6 KB Created: 2020-11-07 14:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1044e8917ae5befaa4e57a142e728410 SHA-1: d92cf886c5ab7de2932dfaa3f7d2352e99fed4d7 SHA-256: 5e93d1775dc7690eeeeb882815157b91dfccc2cdbd70390578412443da48b0b5
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 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://trafficel.ru/123?keyword=conan+guild+invite PDF link annotation
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/daf8cf307.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/lexajuxuwedupu_gefajinuvuf_nofuwekinafe_pimedi.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/fazujo/jufovir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c047895-d667-4b84-9b38-77495e815ab5/sample_welcome_letter_to_new_church.pdfIn PDF document text
    • https://getalam.files.wordpress.com/2020/11/30041979975.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/84272675423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31464898-db7e-43ab-83c5-282cc6b30301/74039437109.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/wipogaremixileje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94642e3-1148-4a87-8b09-a1868db39af9/xojivovubozoliduduredegi.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/history_of_computer_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/digital_marketing_ebooks_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc317170-d172-46f3-bf23-410237d03aa8/vukegufokunosi.pdfIn PDF document text
    • https://kejepototoga.files.wordpress.com/2020/11/86720874390.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_off000064fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 4684 bytes
SHA-256: c78848a7995baca03e94f6136eeec90ee561251b30b789593f97c124822c805b
font_01_sfnt_off00007504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7504 10752 bytes
SHA-256: 8bdc3dbc766996f5387e1c59590bd94fb522ff5e76a80b14f30babb6db36adc9