Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11279f32399a86b…

MALICIOUS

PDF

140.8 KB Created: 2021-03-09 19:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 22097193cdb6e1b7867c42fa519337df SHA-1: 128eb7268e63c7577de9e8563df9df02758bcbc7 SHA-256: c11279f32399a86b01271a6c2c9fecebf63193761d3f34dfe806698249e6ea6b
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 0.9996

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/123?utm_term=que+dieu+la+guide+en+arabe PDF link annotation
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/xuragurikok.pdfIn PDF document text
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/1466266.pdfIn PDF document text
    • https://bifugojatomawak.weebly.com/uploads/1/3/1/4/131437093/44e8b01346c022.pdfIn PDF document text
    • https://dibovasejul.weebly.com/uploads/1/3/1/0/131070518/9691075.pdfIn PDF document text
    • http://hackins.site/fiwogitelibofovuzujegasojt7k10.pdfIn PDF document text
    • http://rubyshup.space/sozemakiwubas1hnj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suzujewa/porapagijigudowinefivafe.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/kh_dearly_beloved_piano_sheet_music.pdfIn PDF document text
    • http://vezenupu.epizy.com/taraxixetobu.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/ph_buffer_and_isotonic_solution.pdfIn PDF document text
    • http://kebojupevanivi.rf.gd/analytical_paper_format.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/95907802201.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/pasarigu.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/zakox.pdfIn PDF document text
    • http://dalumawinalejat.epizy.com/magic_bullet_theory_media.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/15110039773.pdfIn PDF document text
    • http://zapopododo.rf.gd/autocad_drawing_file_viewer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/steel_column_design_spreadsheet_eurocode.pdfIn PDF document text
    • http://tuxumedef.epizy.com/brother_hl-5450dn_drum_leuchtet.pdfIn PDF document text
    • http://vixekufu.epizy.com/free_will_astrology_gemini.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001f3ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F3AB 27456 bytes
SHA-256: b32e22a8b82a092cad9599ec06d4384b45f060d7511bd832657f3fdda0dc7f95
font_00_sfnt_off0001b61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B61F 5016 bytes
SHA-256: 5fe0a84b079ed16c94c321f165196b17ab1f7f0295fe660bd7646eb41bbd9b7e
font_01_sfnt_off0001c737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C737 15772 bytes
SHA-256: 880c76c565f8e07c3eb95c101768d9f45e111a4cbde9f6ff1ca9cd062ace81f7

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