Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c6b43e8bd60e90…

MALICIOUS

PDF

59.9 KB Created: 2020-10-15 10:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f17d6ac4c7c3b8d954cdb957bb24dce8 SHA-1: 7984d98455de7114878391f0c43320c3194f3510 SHA-256: 52c6b43e8bd60e90ec11442eeb9a50d8ff230fdcb2f04ab1b9dc9249800fdca5
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, many pointing to disposable hosting and redirectors, indicating a link farm or SEO poisoning attempt. The document body includes a lure related to 'Game of Thrones' and a URL that redirects to a malicious site. The presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent, likely to redirect users to phishing or malware sites.

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/pify?keyword=got+season+8+episode+4+parents+guide In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/vaxaki_jemevax.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/febanopezalodop.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://site-1040876.mozfiles.com/files/1040876/5388211574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f87bf1ab2f4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8789730d5fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f87b64668212.pdfIn PDF document text
    • https://site-1040376.mozfiles.com/files/1040376/8311426383.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/zudusaluzedej.pdfIn PDF document text
    • https://site-1040663.mozfiles.com/files/1040663/xijojirovudemibunufefevi.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/8a3bbe5e-4ed9-415e-a717-ef3c14d31710/pujera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d6840d-aa19-4bdc-be0a-3afe8e599f0c/tefulubuwamofava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f959bf-d50e-4981-8d71-0e9044476e04/84555506047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4535aa89-ea48-45cb-831d-4b6b8355218d/49008178603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6cdef4b-f69b-4fe5-ac25-280cfd19c528/tuzeni.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D77 5408 bytes
SHA-256: a79120a57542989a7f6a4c8f02b973d0bba5769a5fc3e66d756e62b31dec420a
font_01_sfnt_off00009fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FEF 12840 bytes
SHA-256: e6e91644951aeb862bf75d07294fe64274f60744c9e9bd44a4b30b9cf741df95
font_02_sfnt_off0000ca06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA06 17484 bytes
SHA-256: 209fe79e13ce9391175efa08e0d21688169aefd8e93c31d3e8d1d0596cfd77fc

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