Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0df3b2ce60fa25a…

MALICIOUS

PDF

72.6 KB Created: 2021-03-09 11:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 46377fbdf9882c94478cbba4935c3108 SHA-1: f7939eabaf1a7c970d14fb1d0fd1b1c66b134727 SHA-256: d0df3b2ce60fa25a7ec1ba8f9dbaceeb8ed5fda1249bbd287f4bd079464e9d49
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external links, many pointing to other PDF files hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The presence of these links suggests an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=centralismo+caracteristicas+pdf PDF link annotation
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/aadd95e6.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/tiletujabowil.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/operations_management_certificate_programs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488580/normal_5fef113371e79.pdfIn PDF document text
    • https://korexabareruwa.weebly.com/uploads/1/3/2/6/132680962/jatajimutidijis-tudajekewajo-luxer.pdfIn PDF document text
    • https://kuvijoxujav.weebly.com/uploads/1/3/4/2/134266993/3177237.pdfIn PDF document text
    • https://pekowemorexoxuk.weebly.com/uploads/1/3/1/3/131380284/c1807e2e7c4dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411270/normal_601d240b71464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_60219dffd64f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_60459cb32e815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_603de32270afb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5fce06bab5baa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fe7926cbe9de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493905/normal_602ea0030c531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_013f4d1cae7a4afeac2631b05e38938f.pdf?index=trueIn PDF document text
    • http://sogivuwe.onlinewebshop.net/jiwojutud.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/pekidadopudonefokidola.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_e501b5d0e857413fabd046a6d0edf2d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/jurolaniror.pdfIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_629ee520d12e449ea225237f05527d17.pdf?index=trueIn 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_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 5208 bytes
SHA-256: 9ad6e58f5f09a78478d96fc6253f083fb4f6d117c3df421553565231b57f0485
font_01_sfnt_off0000f1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 10564 bytes
SHA-256: 520ab1225c435aef5dbb8a97af2632734a92b5fb689dd738695b7130e3f53cc4

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