Malicious PDF — malware analysis report

Static analysis result for SHA-256 e941db048c67770e…

MALICIOUS

PDF

54.2 KB Created: 2020-10-15 00:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1fcfc57ea048f3daadd46193613ca0e5 SHA-1: 9a0bc077c07b6c5337c082a5ee3db2f23b14e5ed SHA-256: e941db048c67770ec0aaef29cd87b1e212524df73e02a659bc01eb928cf816ee
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=mastitis+granulomatosa+pdf+2020 In PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/xulisege_pewakagiwunixaf_xuposubofakor_wosanuve.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/degiduxuxut_jofabamukok.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/6924962.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/latew.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/71731b3347bb.pdfIn PDF document text
    • https://site-1041858.mozfiles.com/files/1041858/fadunisaduxuxuxiwaji.pdfIn PDF document text
    • https://site-1038995.mozfiles.com/files/1038995/12091098297.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/wofarixapogopiwazaritonon.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/2088b63b-6f90-4d6a-a1c8-67b8dc7d8fa6/79951084531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98af6ab-d23f-4fe8-bdca-1bb839bae971/44539113906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1353fb4a-f789-4a63-b4e6-862b45909fc2/dixiborekefepivazesitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aed8c71-d710-4d6a-9fa8-128ca16fc234/50180895808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae27369-7d35-419a-85ee-677aa8a8a4a0/xojafodobuzenojewav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4346ad46-3dde-4320-a067-768e10e80e9f/vaxugalilomexuluwuron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f231e9-a65a-41fc-9ac3-da9b1ce23532/kexowolikolipadexab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84be6328-f997-4dcd-94b1-529261fd7488/26459552507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26eb508c-d3f4-42e1-85ae-2e8893fe8db8/22812942303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ccaefb-5477-4ba9-afba-db6b21eca35e/55013583664.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_off00008697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8697 5640 bytes
SHA-256: 7033696cc8f0a22911b3f2dd4b5ef8fcbb8302aff56ca5d811a47b0f56b22f76
font_01_sfnt_off000099b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B0 15472 bytes
SHA-256: ecdfb3d1a85b909505417a2ebf8b7fb79a550dac061df3fdf2e8f32146455798

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