Malicious PDF — malware analysis report

Static analysis result for SHA-256 43dc6ceb454f11fd…

MALICIOUS

PDF

80.9 KB Created: 2021-03-29 18:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 64c1b02ec956a93e63dc29822e6b3405 SHA-1: fe536eb4d2f03c57de49afbbec3a1b224f5a3077 SHA-256: 43dc6ceb454f11fd199d9b250022354e226b2d30414ab375ac1c3201da65a081
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing users to `https://xajibur.ru/award?keyword=bhilwara+district+map+pdf`. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://xajibur.ru/award?keyword=bhilwara+district+map+pdf PDF link annotation
    • http://nafaguxidu.iblogger.org/xuzuzitowupulifef.pdfIn PDF document text
    • http://vefazuvoxezam.22web.org/39182729940.pdfIn PDF document text
    • http://limigulel.iblogger.org/aoe3_asian_dynasties_civilization_guide.pdfIn PDF document text
    • http://xoxuwupoganolo.22web.org/zazawigev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bevegesilegizas.epizy.com/77875358898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157b6af9-e571-4eb7-b51c-e8b3b8c5404c/gifezudidugebazixazat.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/ziturazoza.pdfIn PDF document text
    • http://sesenin.rf.gd/38095519785.pdfIn PDF document text
    • http://pevurabune.rf.gd/26483603797.pdfIn PDF document text
    • http://zopatirek.epizy.com/49014085335.pdfIn PDF document text
    • http://nojodesara.epizy.com/wuvonedegete.pdfIn PDF document text
    • http://xekujigifur.epizy.com/zudafukobirapejavejateku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d87e0eb-1ad6-4904-b31b-d378b3276f50/40238126556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bd8a18-dee3-4222-8496-95a3bf779a25/71487982345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67e93c9-abcd-485a-adcf-51b799ba57b0/harga_keyboard_casio_ct_x_5000.pdfIn PDF document text
    • http://zonadomafi.rf.gd/final_river_boca_madrid_formaciones.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/can_i_delete_ntuser.dat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfc0605-f9fc-4175-bb2d-014bc6e85d1e/nabunoxodubixojoti.pdfIn PDF document text
    • http://gemebam.rf.gd/fusizavukovanosonetanadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faab30ff-ec4c-47bf-859c-38e09ef95671/humminbird_180_fish_finder_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fe0d61-cdd1-4752-9bc4-802163946814/lolodavujigulinowugijunux.pdfIn PDF document text
    • http://tozetusetexu.rf.gd/the_republic_of_doyle_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a269f36a-26c5-4928-a3f2-1616ae60c2c1/how_to_clean_filter_on_bosch_classixx_tumble_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/dworshak_fishing_report.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_off0000fb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 5536 bytes
SHA-256: d0004f78ca2fa58525d4a25d5c5a88cb366a3fe4e575f77a6dc83e4b3714356d
font_01_sfnt_off00010df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF4 11876 bytes
SHA-256: f38dc103a1580e2f61069af5eb5c47d63b53e07671a16cd9f56aed6fc072a56a

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