Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6444e23eb706a3…

MALICIOUS

PDF

44.4 KB Created: 2020-10-16 06:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: bd18a0c933c0e0880852ee4383a9d865 SHA-1: e83ea955f88a2e3ba97e588a18fff5769fae7020 SHA-256: de6444e23eb706a34b4184ca8d228fab91b01bc4af808f56dd0276ffffd2294e
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://gettraff.ru/123?keyword=lab+equipment+worksheet+answers+part+2 In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/mikukinib.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fesixukorupu.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/sosilo.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/fuporefufulipebega.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/bupemigimamuvap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f87e22b71318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8716a55cf1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f87f38c6d2bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f87fd0da4e44.pdfIn PDF document text
    • https://site-1039273.mozfiles.com/files/1039273/mumusizutu.pdfIn PDF document text
    • https://site-1043172.mozfiles.com/files/1043172/adblock_plus_pour_chrome_android.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/15438807200.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/2cb559ec-1974-4f90-ace9-b990f06c5dd8/78986278991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf61badb-50c8-46c1-830b-9a43a35579e7/19037771925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4dda06d-d9ae-4c7f-97bd-87669176c881/14395023524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/715dc247-4c01-4beb-ba58-61fde6064a26/57046443999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb0047d-9273-4649-87e7-9ce0856a55b5/zakobebedel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30178895-b6fc-496a-98ac-4871b28068e8/82354495764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb723e1-d4b7-4adf-9810-e996cabc059e/kemim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ed08c8-b5de-4df2-8c02-2402bd11b5ab/disifofavipap.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_off00006cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDB 5520 bytes
SHA-256: d79a4330e92f7e437fdf07a37898c51ef0daa383b049f9e2b91398f2f06598d3
font_01_sfnt_off00007f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8E 11256 bytes
SHA-256: d35760478a904fcd81453064cca90a658e0f4f582f869b5c32351e2a4d64b76f