Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2519cb6e4fb2dc…

MALICIOUS

PDF

75.1 KB Created: 2021-03-15 01:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d8bbdce7cc24be3ed7f50e1bd4d5ff29 SHA-1: 7940edae2b78c7ab088b8d6585c77a078773a280 SHA-256: 8c2519cb6e4fb2dc6e9b94154448bcab64db26e794dbdc06d7d91af8b27394ea
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/wb?keyword=oracion%20al%20espiritu%20santo%20retiro%20de%20emaus PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481285/normal_6023443bdf99b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_601590c799c50.pdfIn PDF document text
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/4506768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469375/normal_604830734df1f.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/1966694437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426832/normal_604e91dcc574f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462374/normal_601cb2dcc905c.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/41965088726.pdfIn PDF document text
    • https://faxilazow.weebly.com/uploads/1/3/4/7/134725206/zoxikumofifizuziji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5fd7a9783ed66.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/70c77ff2-19f1-4389-b359-84e0e2f253e6/schlage_camelot_handleset_satin_nickel.pdfIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_a4f08bb91bb242c1b2492c0b453f0d07.pdf?index=trueIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_93c02dc59e664c9c99821d5736e502a0.pdf?index=trueIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_c172045d908c41d1b05717a515ffe92f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c38d38-f26f-4814-b454-d77f2fc79c1e/tomuf.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_off0000e4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F6 5248 bytes
SHA-256: 2d095e894ec2d18c7ca1d8aeb4d794bc9ec67ef242d38fd20f09c64206b405fc
font_01_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 11900 bytes
SHA-256: bcdc57b8ccea93db2c8d7598a83930ce4197b03ad3074a3128e681800a77b616

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