Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f17df9a8b91874e…

MALICIOUS

PDF

48.8 KB Created: 2020-11-09 04:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: d9faeeeb9cac5ebf8a50de47a7aeb856 SHA-1: d13e35da6d270150bfaa00317d2bcc7e34e2c695 SHA-256: 3f17df9a8b91874e0878dc5d4ccf81adeecb5ed965ba133d0b4ede99edd30eab
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/123?keyword=paul+harris+stores+closing PDF link annotation
    • https://wopuremob.weebly.com/uploads/1/3/2/6/132696580/dugiwaki.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/vuviwuka.pdfIn PDF document text
    • https://lobakazuperowe.weebly.com/uploads/1/3/4/3/134352895/ripodirafuw_nanivesaruxuvud.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/418976.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wupolekofajo.files.wordpress.com/2020/11/kufitaroguwidi.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/atomic_structure_class_11_notes_in_hindi.pdfIn PDF document text
    • https://gexuzovi.files.wordpress.com/2020/11/reflexive_verbs_practice_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a78a04-95e2-4ffa-b205-987874e1ca4b/the_rose_of_paracelsus_wiki.pdfIn PDF document text
    • https://zujebira.files.wordpress.com/2020/11/22480859665.pdfIn PDF document text
    • https://rewuvitosil180903676.files.wordpress.com/2020/11/motuxajipadilitonem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0fc5fa5-174d-47c2-8ae8-77504f3ee089/jawim.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_off00008302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8302 5060 bytes
SHA-256: afa4688b72b5d5f80bddf880cc33f77cdc35fe88de7fac3b993a0f4d4db35353
font_01_sfnt_off00009433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9433 10368 bytes
SHA-256: dec8bee8b40e01e2480b49c07f9365baeb5fc35b42d5e50869e36df19fb7aece