Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c8c9598342543f…

MALICIOUS

PDF

41.2 KB Created: 2020-10-06 15:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bd76cd1dd8437710fb2c43e53e7ef8fc SHA-1: fefec9676b50e763849c6e2285b376b75a02f915 SHA-256: c2c8c9598342543f945823d971c8f150b6dafaba5c73264520026cdc74c9ea86
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=dominic+o+brien In PDF document text
    • http://wadatix.fabianwahl.de/uploads/1/3/1/8/131856543/2962480.pdfIn PDF document text
    • http://files.msheymont.com/uploads/1/3/1/4/131407683/dewop_duvoxibuwo.pdfIn PDF document text
    • http://files.kristinachomicklmft.com/uploads/1/3/2/6/132682303/punerekakil-kurex-tiponowol.pdfIn PDF document text
    • http://jubamugut.teresacornacchione.com/uploads/1/3/1/6/131637291/7789780.pdfIn PDF document text
    • http://files.nhtelephonemuseum.org/uploads/1/3/0/7/130775649/6148523.pdfIn PDF document text
    • http://files.crossfitzonedesign.net/uploads/1/3/0/7/130776445/8e6ed.pdfIn PDF document text
    • http://rasowi.geekaroni.com/uploads/1/3/1/3/131380160/5730936.pdfIn PDF document text
    • http://files.el-zunzun.com/uploads/1/3/1/3/131379134/difafobotak-rotulukafot-dijiletuwup.pdfIn PDF document text
    • http://files.danielyanezgonzalez.co.uk/uploads/1/3/2/3/132303329/devol.pdfIn PDF document text
    • http://files.mtcalvarydetroit.org/uploads/1/3/0/7/130739084/fejetuwifesilab.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/4f584dd9-c785-452b-9895-cd237cd8236e/naluraxaxajasivolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82a5b9d2-793d-4a6d-b8c6-61b42ad3795a/74375491195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88fac066-7d2d-4bb2-b446-156e3ac104a8/88182959379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af374236-0c98-4872-8390-3a4b30eadd6c/wosulazolitazulipam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c030176a-b1dc-443b-9d3e-bb72b2af4172/reniwokokuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23660401-bec9-4107-8406-721a50f451a5/67329197074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0347fbbd-0d9d-41b8-89df-b774e3b13bed/mijij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc0cbb0-10ea-4220-8dee-82fabfb436af/95743591225.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_off00006495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 4664 bytes
SHA-256: 90387ae5872c2dfce2487f67788fd15bdb10e690b4c3efbe78b1386c2fe55e61
font_01_sfnt_off00007463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7463 10424 bytes
SHA-256: 0ef3cf300cba68d35f4487776f8612f01f2a994b2a5c41fae145e2ce23af7d5a

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