Malicious PDF — malware analysis report

Static analysis result for SHA-256 780c14d6a1b506dc…

MALICIOUS

PDF

43.7 KB Created: 2020-10-09 21:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 99ed6980c1dba352ce0e1e0ba7d0a1ed SHA-1: 90dfe2347485ca45d288085225f6357844016c1d SHA-256: 780c14d6a1b506dceab797b0d325f248314a0761576d3c748e46095da0b4f20d
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=kenmore+progressive+vacuum+bags+50557 In PDF document text
    • http://files.eastprospectparade.org/uploads/1/3/1/3/131383934/jebosusekep_kumixusosabura.pdfIn PDF document text
    • http://files.hivetextension.com/uploads/1/3/1/4/131454090/8628204.pdfIn PDF document text
    • http://files.evelynjuliabodywork.com/uploads/1/3/0/7/130775084/xatolorimolivu.pdfIn PDF document text
    • http://files.djmcwho.com/uploads/1/3/1/4/131483184/nuwixajopunapil.pdfIn PDF document text
    • https://site-1039883.mozfiles.com/files/1039883/96746494926.pdfIn PDF document text
    • https://site-1039992.mozfiles.com/files/1039992/goxemoxopagafuboruwir.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/xuxadobefonerejidig.pdfIn PDF document text
    • https://site-1036871.mozfiles.com/files/1036871/3563227876.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/1/0436/6991/3753/files/dot_plots_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5297/7313/files/kunawugitowonadumitoziwur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6761/5648/files/sample_donation_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb95ab69-f35a-437f-926c-c78ea430a689/32521887991.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_off00005382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5382 5736 bytes
SHA-256: a7825e339572441b8d380da37ee497b9b6079bee6d04cae18e5329c710478d6b
font_01_sfnt_off00006706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 10668 bytes
SHA-256: 8bcdb2db047fb0682f7cb8d66101093861ecb63e103796da56963ae4cd2be684
font_02_sfnt_off00008bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAC 16116 bytes
SHA-256: 24ffce0b1ec84c3fa4859ecd3199e32d906aeb21be70a16db732fd88e3c74ddc