Malicious PDF — malware analysis report

Static analysis result for SHA-256 1956a789a4652ccb…

MALICIOUS

PDF

36.7 KB Created: 2020-10-01 14:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4007e1fc737ca379ead1af3e573c39d6 SHA-1: f270a24a59cc207186b25258c6fd0084ebffe705 SHA-256: 1956a789a4652ccbca3753dbd83a3cf772f0762d4d400a48e865ad54b48dff2e
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=cations+and+anions+worksheet+pdf In PDF document text
    • http://sugak.enlightenedcorner.com/uploads/1/3/1/4/131436956/3f374.pdfIn PDF document text
    • http://xuvuva.susanweinerbooks.com/uploads/1/3/0/7/130776262/begijofage.pdfIn PDF document text
    • http://files.flashfitnessresults.com/uploads/1/3/0/7/130739895/garuvedikaxaxow_pawolozawisakev_gibex_lodakanakemi.pdfIn PDF document text
    • http://files.becomingyoursunsign.com/uploads/1/3/0/7/130776393/nejunatetu.pdfIn PDF document text
    • http://files.artatthecenter.org/uploads/1/3/1/3/131398194/595886.pdfIn PDF document text
    • http://files.efdesign.studio/uploads/1/3/1/3/131379296/e67e0c6a5a7c.pdfIn PDF document text
    • http://fejowiwix.herewoodsart.co.uk/uploads/1/3/0/7/130738546/5432287.pdfIn PDF document text
    • http://nugavadab.carolconnor.net/uploads/1/3/2/6/132696056/kodekapimofi-katekogiriru-nobexezeges-vutosetevum.pdfIn PDF document text
    • http://files.nimatennis.com.au/uploads/1/3/1/6/131606965/4116325.pdfIn PDF document text
    • http://fotopede.calmcradle.com/uploads/1/3/1/6/131606165/japevebidodiz-bidaf-botono.pdfIn PDF document text
    • http://vovop.unbalancedbrands.com/uploads/1/3/0/7/130775934/543aedf2244e80.pdfIn PDF document text
    • http://nufiduka.northwestiowatournaments.com/uploads/1/3/0/8/130814328/361aad14.pdfIn PDF document text
    • http://files.wolfememorials.com/uploads/1/3/2/8/132814228/dijejero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8910/7869/files/vutojenapitomoradizuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/14830376139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9245/9925/files/rebisotal.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_off00004cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF8 5160 bytes
SHA-256: fb1dcd309504eea391bf4f11b283244918c8f1a5f653e4628183f5cfd5099491
font_01_sfnt_off00005e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E90 11512 bytes
SHA-256: 966a5ba00f5ab4cb5a100830e610ab8f6bf2746327758429c6e7fba23dbce440