Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee61ccb8da84d4f…

MALICIOUS

PDF

74.7 KB Created: 2021-03-01 04:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2323e787354d85d0285e91e1c5204fac SHA-1: 9de82420c10ee70706eb2594ec0acbac5f2961db SHA-256: 5ee61ccb8da84d4f66e8b37a59327af30f011be120ee4d868898b562b62967d9
156 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 0.9998

Heuristics 5

  • 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.
  • 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://leonvi.ru/wix?keyword=beitian+bn-880+specs PDF link annotation
    • http://sis-paypal.com/nugimealh3b.pdfIn PDF document text
    • http://idealica-ordina.site/3003267998pekyv.pdfIn PDF document text
    • https://lixawedubofalat.weebly.com/uploads/1/3/1/4/131407760/bebori.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/is_the_exorcist_series_coming_back.pdfIn PDF document text
    • https://fodubimofo.weebly.com/uploads/1/3/4/8/134884763/9e709380.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/naxivobulev.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/media_essentials_a_brief_introduction_3rd_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixuroruwe.myartsonline.com/where_can_i_buy_gone_with_the_wind_book.pdfIn PDF document text
    • http://bitines.myartsonline.com/mawurova.pdfIn PDF document text
    • http://xugivazule.rf.gd/3d_chess_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/powadogiwerepelo.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/60888449584.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/rubber_sheet_making_machine_in_coimbatore.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/cbse_arabic_textbook_class_9.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/80742977078.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_off0000d920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD920 5356 bytes
SHA-256: f17bfdde0f85bca6d656450aa31584e6867a3d50e5a3de2719aaf5a1d5bd26ac
font_01_sfnt_off0000eb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6C 16336 bytes
SHA-256: d794053ba65de9e1eb5d50c65c633dfec9551898fb1ba4aa866be1b9ea068d4b

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