Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a66238b8b2ec806…

MALICIOUS

PDF

52.8 KB Created: 2020-10-05 01:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c3e4e0491e8ed86e98c60629e047010d SHA-1: 6af87be2421fa29fe800a0f59d8917758457a1b6 SHA-256: 8a66238b8b2ec80683255dc6e7d50c1b420f293cb67f925ec608bdc4490fbb75
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=catholic+mass+songs+lyrics+and+chords+pdf In PDF document text
    • http://rugesu.stphilipstdenis.com/uploads/1/3/0/7/130739415/sujaf-basaxovolajega-zukizilafajodu-didujamivezu.pdfIn PDF document text
    • http://repetex.haraldwiltsche.com/uploads/1/3/1/4/131406806/kipukarikapinezovir.pdfIn PDF document text
    • http://files.diekmancounseling.com/uploads/1/3/0/7/130739833/mitoda.pdfIn PDF document text
    • http://xebup.emilyaswartz.com/uploads/1/3/1/8/131859261/mejudifap.pdfIn PDF document text
    • http://files.duetoffers.com/uploads/1/3/1/1/131164546/gerumuma-xiredoga-fadosexa.pdfIn PDF document text
    • https://site-1043771.mozfiles.com/files/1043771/24553130225.pdfIn PDF document text
    • https://site-1039669.mozfiles.com/files/1039669/1641859853.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/wobijod.pdfIn PDF document text
    • https://site-1038339.mozfiles.com/files/1038339/sazafujedopixunupu.pdfIn PDF document text
    • https://site-1037878.mozfiles.com/files/1037878/kefowefiga.pdfIn PDF document text
    • https://site-1040339.mozfiles.com/files/1040339/52450022150.pdfIn PDF document text
    • https://site-1038699.mozfiles.com/files/1038699/25276372828.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/dewivik.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/396b4043-b662-4263-b2af-6ba650bd9494/45562934760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b2012d-31d9-40bf-99bf-f23427c22c7e/64870802560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf00a27f-8abc-4be8-a2eb-b80f3801467e/10516417916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c74f4d43-77fc-4690-b256-af709153bc5e/daxejajoritarogagidata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773dbb66-8c03-48de-a1a9-6217b85f9d22/49334112007.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_off00009006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9006 5576 bytes
SHA-256: ac949fb526c8f949514aa91fee0c8c3eadb169c1f91718b0e83147dd9bc2711e
font_01_sfnt_off0000a2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D9 10252 bytes
SHA-256: b9c864fdfa28f74cc80232d069b8eb2080d5ca620cb10684ef53b949fbe1dc89

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