Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df808c5cf0637a5…

MALICIOUS

PDF

50.9 KB Created: 2020-10-16 04:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 76c76d6c803d7018806fac65356ce55d SHA-1: 675ea878f7df20bc0c0a1bfaf34a98a3e229d343 SHA-256: 8df808c5cf0637a56b19dff2a59629dca19ceecb98cc9e6609774ed587ae6b30
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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/123?keyword=principles+of+environmental+planning+and+management+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f88b8d2b7de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f872bf3d7bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f87c5660f0cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f88b49c792c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f8744fd800fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f884f83cacaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87204e36362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f88a6081903c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f88c9506da94.pdfIn PDF document text
    • https://site-1042725.mozfiles.com/files/1042725/wumamik.pdfIn PDF document text
    • https://site-1039257.mozfiles.com/files/1039257/42941162823.pdfIn PDF document text
    • https://site-1040613.mozfiles.com/files/1040613/kafoto.pdfIn PDF document text
    • https://site-1042931.mozfiles.com/files/1042931/jojomedefuwul.pdfIn PDF document text
    • https://site-1042670.mozfiles.com/files/1042670/73056475819.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/293d496f.pdfIn PDF document text
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/2865a361.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/gafamukaje.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/poxaporokizo.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee71e075-1329-47d1-a293-6dc09bc111d9/3922895949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2afbd29-4491-4410-bb06-bb6bc773f82d/41421332734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd5a9d4c-d859-4358-8fc3-93c7176c6a07/xulisosonazorasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f94c6e2-fea1-4acd-9b6b-27a734e9abc5/dopalavogikadupaxo.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_off0000877b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877B 5536 bytes
SHA-256: de58633d88c9c08c9b0c60a2d544be559501a8b8b685107d3e0e281441eee36b
font_01_sfnt_off00009a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A30 10388 bytes
SHA-256: 9e7f7bd8d0432baf905c23fe82d64e1751612ffda1fe0b0800fb1d01b37a4b2e