Malicious PDF — malware analysis report

Static analysis result for SHA-256 5576a18c5baf30ea…

MALICIOUS

PDF

34.5 KB Created: 2020-10-02 15:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 37785788c15bd3a97c901f4b6e421468 SHA-1: fc14fc5eb171281eb4d7d17ae3cdf0fd788abfda SHA-256: 5576a18c5baf30ea783df58950f0ea480a3a672fb285303ee0d84456cd87830e
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://cctraff.ru/strik?keyword=formato+cedula+venezolana+2018 In PDF document text
    • https://site-1039409.mozfiles.com/files/1039409/dagibazodowi.pdfIn PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/sanifokokenanoboxilo.pdfIn PDF document text
    • https://site-1038783.mozfiles.com/files/1038783/jegazawajoboguduvedufiw.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/98303347949.pdfIn PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/xutir.pdfIn PDF document text
    • http://files.diversitychampion.org/uploads/1/3/1/4/131437307/jelel.pdfIn PDF document text
    • http://files.westcaldercatholicchurch.org/uploads/1/3/0/8/130874161/9026031.pdfIn PDF document text
    • http://files.marychristineparks.com/uploads/1/3/1/3/131398128/leruxewob.pdfIn PDF document text
    • http://files.pearlofgreatprice.ca/uploads/1/3/1/0/131071164/xijuvononejin.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/4e4cb659-0e2e-489a-be65-a8fa610fbad7/7438208043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e984e5a-545a-420e-9c37-bfb31651c409/fikotaxudorifafomobaret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0525be4-ff02-4f66-b3c4-14a309790055/fegulavafemelukix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f4289f-b3f6-4bd1-8e60-a40402d38951/38244201587.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_off000045fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45FA 5492 bytes
SHA-256: 00ea4468d762496c30dace7f2ca8a839ef01ab4e9b9df04f42f0f154085c73ab
font_01_sfnt_off0000589d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x589D 10820 bytes
SHA-256: c92a88fbdd157fb107a83df7504d15a85d47e2e3c3dfe40fc8716bc72bddce86

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