Malicious PDF — malware analysis report

Static analysis result for SHA-256 6804bbddccc58539…

MALICIOUS

PDF

43.5 KB Created: 2020-10-02 05:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 130b5f6ce6163d577b3bb110ac93c5f0 SHA-1: e4e3c0ee0718dc973e40f26536428a38a1261a23 SHA-256: 6804bbddccc585393eb0bdedaee8f7484868ba89ea1486abe3e627f700f48f35
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=quimica+geral+russell+vol+1 In PDF document text
    • https://site-1037905.mozfiles.com/files/1037905/gepipesuwusotunupexif.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/41029132294.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/53786158765.pdfIn PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/65429705183.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/nivikimerajopureruxav.pdfIn PDF document text
    • http://files.katieyounggerald.com/uploads/1/3/1/6/131607010/7921721.pdfIn PDF document text
    • http://files.raadmaasland.nl/uploads/1/3/0/7/130775411/vezodemazidupujibol.pdfIn PDF document text
    • https://site-1038416.mozfiles.com/files/1038416/18842649508.pdfIn PDF document text
    • https://site-1039324.mozfiles.com/files/1039324/misodadigarufizutokibasew.pdfIn PDF document text
    • https://site-1036924.mozfiles.com/files/1036924/tetekanevokoligonubojiwid.pdfIn PDF document text
    • https://site-1039806.mozfiles.com/files/1039806/wazisa.pdfIn PDF document text
    • https://site-1039847.mozfiles.com/files/1039847/tunupotiberurofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6f73e557-b2ca-4101-a7db-55b19ffc3165/ruderovusitunoxepisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f3cbf2-4cc0-47c0-9cee-afc01a47fe3c/39551015324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a09cf8-5643-4334-a7ae-a8bc1e083764/68438287336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cfa825-fa46-432b-9485-ccda46060da3/bewegaxuduruxovitefano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f54cb7-7f92-4692-a273-eaafd7748964/92616540052.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAE 4988 bytes
SHA-256: 2d9d2c678ae4a99bfdd9ec397a73bc72b35b21c50fa816146f79688fb66d5320
font_01_sfnt_off00006fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA9 10300 bytes
SHA-256: 201b77e26dccdc65871fe11f54d39e4f237ec716386c4c4c6cd8a40a70c91773
font_02_sfnt_off000092cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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