Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef26de19ca90c322…

MALICIOUS

PDF

72.4 KB Created: 2020-10-03 06:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3cef8bebd60edbe8765a8ba65331a31c SHA-1: bd338863ccd244084e629dbb43d5b47bd811fc1e SHA-256: ef26de19ca90c322bdf29dbbf826d2445c9fcce563fed0ffd4b4551695ec4a52
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=coraline+movie+script+pdf In PDF document text
    • http://files.bloomingtonbirthdoula.com/uploads/1/3/1/4/131407952/lizadumomuzexaj_vuzajezobek_difajomegapum.pdfIn PDF document text
    • http://dixijizo.hunt-archive.com/uploads/1/3/2/7/132740327/d79177ca2181f1.pdfIn PDF document text
    • http://files.travelwithlanka.com/uploads/1/3/0/7/130739991/nubogudopixat.pdfIn PDF document text
    • http://files.lochatuathnews.com/uploads/1/3/1/4/131406248/rusagezotaroma.pdfIn PDF document text
    • http://files.mackbuildltd.com/uploads/1/3/1/6/131606672/kemezele.pdfIn PDF document text
    • http://files.dagtypefilms.com/uploads/1/3/2/3/132303219/8605925.pdfIn PDF document text
    • http://files.ildiamon.com/uploads/1/3/0/7/130776589/fimipofeka_sepolujebiji_lowikakuloz.pdfIn PDF document text
    • http://files.sojochoralarts.org/uploads/1/3/1/1/131163956/9739087.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/1/0479/5655/7980/files/wejowerub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1470/9160/files/bevatamigijofaxewobiluzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807645c2-4492-436a-ab78-e3e492990a1f/78368805001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f99be8-87c3-4f06-a4d0-0a763c7bcd71/82654058585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c5743b-2b02-4633-bddd-08d4da6bd2a8/jixelofupamademolajiroron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c7beb6f-9035-49ec-b61e-d62db645fb3a/sagob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8c316b-547e-4740-aada-8da64a46d1c3/87027289162.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_off0000dc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC84 5264 bytes
SHA-256: 4a1d7bf815a27dd2b6aee9525a0033ecbceb6d64efd7ee7b1201e96085776995
font_01_sfnt_off0000ee59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE59 11760 bytes
SHA-256: ece40abdb13f708adf1250f44a83e3c7933b310d8da543ba00ab0dba4ecd7b25

Open this report in the interactive analyzer, or submit your own file for analysis.