Malicious PDF — malware analysis report

Static analysis result for SHA-256 9469b8b1cfd39ae6…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 07:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5a6a4df70da56e96af65116603570c9a SHA-1: 72cb02dd6f5cf99c0172bef37ebf2cea9184184d SHA-256: 9469b8b1cfd39ae6c1c1651860a742d9900c6d6a45fe5411ad18e344aae9ab79
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links, 'https://jumiwimov.ru/award?keyword=presidential+election+result+2020+pdf', is suspicious and likely leads to a malicious site. The ClamAV detection and ML classifier also indicate maliciousness, suggesting the document is a phishing or malware distribution attempt.

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://jumiwimov.ru/award?keyword=presidential+election+result+2020+pdf PDF link annotation
    • http://goligofalu.medianewsonline.com/bible_quiz_genesis_chapter_22.pdfIn PDF document text
    • http://totudini.iblogger.org/21294600288.pdfIn PDF document text
    • http://kivumokaf.22web.org/savotavubalokekotinivifij.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/que_es_escudo_segun_la_biblia.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/9e1facd3-bef0-4aed-a011-6fbfce89f926/how_much_does_a_wood_burning_fireplace_insert_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d58617-eedb-481f-b5bb-1d8e78b25868/45280626504.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_bd0c653a56cb45a58c08e7a5ea0e64e3.pdf?index=trueIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_c4125951a0a9420a94e2eafb9a1c6a77.pdf?index=trueIn PDF document text
    • http://xazomagojuwa.epizy.com/traductor_espaol_a_portugues_brasil_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/laxeduki.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/burnout_full_video_song.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_c36be9e061254e2eafd0194cf09dca71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/somisilegex/mowenin.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/wutuxar.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/zulefazuxojefegaguna.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/batch_annealing_furnace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1e8c62-bec5-41fb-8760-60b2cb1d01fa/21138422498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063a1aec-e193-4311-b8b3-22e50314a112/sibananonineje.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/zusewinogu.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/62484425362.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/gozobajovorasatek.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_off0000ed10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED10 5424 bytes
SHA-256: c598bd36882d7cfb7889672bd9cde412a621d8e41981e066483540db3cbe6bb9
font_01_sfnt_off0000ff8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8E 10776 bytes
SHA-256: 0064a9d3f6c1f4cea43edd45417ae6d8225fc37dc96ed35631732e5dcde35319

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