Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a604bb9367585f…

MALICIOUS

PDF

42.0 KB Created: 2020-10-05 20:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1ce8b459eb2053163feb3acd22b20e86 SHA-1: f06bbe7ed251ef20a8836840345ea3bc11aef4cb SHA-256: 27a604bb9367585f6b5687237931165fd23eb14976cd11e44bfbd9a27b5995ae
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/strik?keyword=figurative+language+test+answer+key In PDF document text
    • http://files.gbresources.org/uploads/1/3/1/4/131411539/5942768.pdfIn PDF document text
    • http://wedotavis.ires-8.com/uploads/1/3/2/7/132710712/tarakoruriso.pdfIn PDF document text
    • http://files.angelfacejewellery.com/uploads/1/3/1/0/131070226/6801387.pdfIn PDF document text
    • http://gofopepij.nagia.org/uploads/1/3/1/1/131164097/7a79255f106b8.pdfIn PDF document text
    • http://panug.mccarranferguson.com/uploads/1/3/1/3/131379856/d58b8e78976598.pdfIn PDF document text
    • http://files.rondotsondesigns.com/uploads/1/3/0/7/130776541/5168395.pdfIn PDF document text
    • http://mawelel.gwgraphicdesign.com/uploads/1/3/1/6/131606260/wofagezasuko_fafikelosozi_subilebol.pdfIn PDF document text
    • http://vuler.suzannejoyal.com/uploads/1/3/0/7/130776219/jasev.pdfIn PDF document text
    • http://files.beasleydoodles.net/uploads/1/3/1/6/131606666/c2831.pdfIn PDF document text
    • http://files.refreshglobalnfp.org/uploads/1/3/2/8/132815960/6908795.pdfIn PDF document text
    • http://files.mamasgardensskincare.com/uploads/1/3/0/7/130776263/nomipofaxefolarowir.pdfIn PDF document text
    • http://files.rbvonline.com/uploads/1/3/0/8/130873738/levarok-fezalepaka-zipoluzuririred-wabib.pdfIn PDF document text
    • http://files.hunchdesign.com/uploads/1/3/2/6/132681560/tiluzifo.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/1/0429/0835/2679/files/46835098339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/nejibavobuposekesulad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/deuter_guide_tour_35_sl_backpack_womens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/dcpo_test_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8755/1382/files/pa_driver_license_renewal_covid.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_off000065cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CD 5124 bytes
SHA-256: 14c58598197ed81aeb0e2a7e25cb459549245474223c1c432b2929c1485475b3
font_01_sfnt_off0000776f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776F 10356 bytes
SHA-256: 4dde2692a8255994cc0afff032da2eb7a33d3806c227be99d53804b989ac09d6