Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e0c60ad533c910…

MALICIOUS

PDF

70.1 KB Created: 2020-10-10 23:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 786e23a11e0d51b1384399147ab69f24 SHA-1: 7bddd66f72d53a726073edf977d3bbe638cf99a7 SHA-256: f8e0c60ad533c910cf04cd0dc709fd202578880eb3c9f8c5431bdb175c859af6
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/strik?keyword=comprehension+reading+exercises+toefl In PDF document text
    • http://files.hollyboyter.com/uploads/1/3/2/6/132695741/33fbe27b7e057.pdfIn PDF document text
    • http://files.innerserenitymidwifery.com/uploads/1/3/0/9/130969057/5549f4d0.pdfIn PDF document text
    • http://files.maitrikundalini.yoga/uploads/1/3/1/4/131406391/xotimaf_zofepiwutidofe_sodanuwibewu_wulibejinofom.pdfIn PDF document text
    • http://segonozuk.sixthcourse.com/uploads/1/3/0/7/130775734/mipus.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/povilavoxizag.pdfIn PDF document text
    • https://site-1041489.mozfiles.com/files/1041489/sobojixiludadegenerik.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/77299320453.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://uploads.strikinglycdn.com/files/5e3ebedc-2de1-47f6-a61d-dd3b79e8e086/53554357566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291d3f3c-f7a9-4645-82d5-d9aceaf29e05/wurof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42b75e4-ebf2-4e06-af6d-62c7f7048f20/gutalibozagow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d83fdd-b5f3-4e56-b1c0-152c38e7d81d/pepidupuxapadavaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06525a17-c28b-4665-8e58-9a0ebfe0aa25/693057794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3dd4b0-5f88-425e-9e8a-b8b43fa2fe7a/fujojeket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1dea644-ef16-4c90-b6bc-2323638b9480/89894085832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/babb8036-a105-434e-80fa-8197603c75b5/vamaresezup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17728918-bba4-4326-8914-52b18f00f9ab/79854159918.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE33 5448 bytes
SHA-256: 4168cf0230059833b57f132eedec0dca88d387b214419cb87fa08f2a0e1a15e2
font_01_sfnt_off0000d08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08C 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000d91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91A 10360 bytes
SHA-256: 16891a902a354d0b0182bd780a3877d61757b7e085ec2dd0b9ce4bd1e0b9fbb9
font_03_sfnt_off0000fc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC84 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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