Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2a4237d92f47c7…

MALICIOUS

PDF

68.7 KB Created: 2020-10-05 03:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 29d9e0d9b17a90470c17fc5069bcd833 SHA-1: d9899dfeb40cf6a72f2a84411d72827c5722113c SHA-256: 4d2a4237d92f47c7f7f2cea381a2203755c94db4c4e957b3e474a19a475c7d1a
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=auditing+and+assurance+services+16th+edition+solutions+manual+pdf In PDF document text
    • http://gatabenu.eleanorroseoutdoorquiltshow.com/uploads/1/3/1/3/131383309/8284962.pdfIn PDF document text
    • http://files.prayhustleslay.com/uploads/1/3/2/6/132682655/rogulak_sulogufuwezotaz.pdfIn PDF document text
    • http://files.maryjanescott.com/uploads/1/3/2/6/132681783/48d7637.pdfIn PDF document text
    • http://texaj.overseersmasonicriders.com/uploads/1/3/0/8/130814017/dixumuvewu_woxugof_tefit_purezi.pdfIn PDF document text
    • https://site-1039328.mozfiles.com/files/1039328/fipurewada.pdfIn PDF document text
    • https://site-1044292.mozfiles.com/files/1044292/zaworunisevakimifopusebov.pdfIn PDF document text
    • https://site-1039188.mozfiles.com/files/1039188/fuzesabunukesever.pdfIn PDF document text
    • https://site-1040767.mozfiles.com/files/1040767/bunuzemudawom.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/80731237653.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/b79b4f82-3c36-497a-941a-71cb843b0043/rexijivoxazede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5b03fb-11c1-4491-944b-8063b65d18b7/46699750529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfe9ed4-8d40-4548-9a70-86d484e9573c/5797344251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9b7a32-4128-46f3-bc11-b1f235f6c5e8/9773842371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc269b1-ccfa-4f5a-8615-a02edb268f9b/18722198063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043184b6-e9b3-43f8-ab49-bdc947cd55c3/demosixajiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c159d370-a657-43fa-bb69-cd8382ae3292/taboxidegolid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83971dd9-249b-4a76-ac6d-dbf7b6acf8bd/bubelepe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB625 1712 bytes
SHA-256: 2573ba3dc413a71f166e7e7d7cc0106b583dbeda74e41e7f2bfe02906d3a43a1
font_01_sfnt_off0000be35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE35 5704 bytes
SHA-256: aae72e59366c18dc71bccc65f5c07ec0662b97a4727d43f36b9a4906aa67e4b0
font_02_sfnt_off0000d175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD175 11156 bytes
SHA-256: e131fa33a02e559d050c18689161f1f7b221e795a421279039ec730e2b287c33
font_03_sfnt_off0000f61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c