Malicious PDF — malware analysis report

Static analysis result for SHA-256 87580d0614f35bf3…

MALICIOUS

PDF

115.1 KB Created: 2021-05-29 07:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e6f1cd1dc00a33ef645517482567bfa8 SHA-1: 50ee79139306e8b58873a4e03b979382c99f7caa SHA-256: 87580d0614f35bf36a9e5380baa54005bf0548f44aee2fd79d2127d8f414cb08
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/strik?utm_term=risalet+%25C3%25B6ncesi+d%25C3%25BCnyan%25C4%25B1n+dini+durumu+k%25C4%25B1saca+%25C3%25B6zet PDF link annotation
    • https://xusofudubivo.weebly.com/uploads/1/3/0/7/130775679/cfc57e9b71.pdfIn PDF document text
    • https://dilomosef.weebly.com/uploads/1/3/4/3/134316650/dezodumosibapog.pdfIn PDF document text
    • https://kazefapakoj.weebly.com/uploads/1/3/4/6/134644741/e1258c66b00.pdfIn PDF document text
    • https://kudezugomolalu.weebly.com/uploads/1/3/5/3/135331411/ea82bcb8c4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_600e86fa12da3.pdfIn PDF document text
    • https://gajabalavira.weebly.com/uploads/1/3/5/3/135347595/jajaroxonalasex.pdfIn PDF document text
    • https://xiliperudal.weebly.com/uploads/1/3/3/9/133999468/basamudoz_wivoguwut.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/balotokogisaj.pdfIn PDF document text
    • https://rajawanog.weebly.com/uploads/1/3/5/3/135320481/c84eb77eeeac.pdfIn PDF document text
    • https://jefabulovonaju.weebly.com/uploads/1/3/1/4/131438419/fiwudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_5fd1592513e9a.pdfIn PDF document text
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/dawiregumi_vodakipan_tibuzuposakez_nedubirafa.pdfIn PDF document text
    • https://pejirudofatepo.weebly.com/uploads/1/3/4/6/134648176/godomude.pdfIn PDF document text
    • https://tumegifokax.weebly.com/uploads/1/3/4/2/134235775/vivamodowaxujagil.pdfIn PDF document text
    • https://takupomowemeb.weebly.com/uploads/1/3/5/3/135314116/xavorejozakedek.pdfIn PDF document text
    • https://gopogusefivow.weebly.com/uploads/1/3/1/4/131406686/a8646aa96dd85d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_6039ddbb4dd41.pdfIn PDF document text
    • https://kewidavarij.weebly.com/uploads/1/3/4/6/134696647/zeloki.pdfIn PDF document text
    • https://milobixokat.weebly.com/uploads/1/3/2/8/132815045/toxofiw.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/573f85ca-319b-4db4-92e0-c4f72e8d70a1/att_handset_cordless_answering_system_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de0049c-d2e0-474d-abf0-7db9f5a2770a/53507853258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91598cc3-6786-462a-865b-d7f4639dc64a/does_hiit_weight_training_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef7f371-9fd2-45aa-a2a0-dcf29b0bdc20/abbi_glines_sea_breeze_meets_rosemary_beach_family_tree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9573ce66-035a-44d7-acc2-c56a7ea4ab21/wifufunutubafi.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_off00018174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18174 5596 bytes
SHA-256: 390c3ad5298fc340990546e613b62e5186800b435bfbd9eedf986e7dc6f289ac
font_01_sfnt_off000193fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193FE 13388 bytes
SHA-256: 5c0160687c882cb56a3d85dd255755bb9fe9742a04be020357cc53a4e208d670