Malicious PDF — malware analysis report

Static analysis result for SHA-256 e247974833a772d6…

MALICIOUS

PDF

94.5 KB Created: 2021-09-24 00:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 21d93b6623cb91f3f6a2e9f6ca9c2add SHA-1: 739b59d5d36366a3ab207c31c6aaa52874d49fb5 SHA-256: e247974833a772d6022f1b2bf99b0ac4e14761cb50d77366cd181ebeb2eeb6c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to lure users to external malicious resources, likely via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=ever+after+full+movie+free PDF link annotation
    • https://pracowniatechart.pl/fckpliki/file/tepekubinir.pdfIn PDF document text
    • https://duvarkagidierzincan.com/userfiles/file/wewavogadariratipokuw.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/44472414048.pdfIn PDF document text
    • https://remini.hu/userfiles/file/nelenekuf.pdfIn PDF document text
    • https://ocw.tw/uploads/files/muwilupugokopadorifexevo.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d3a973b15---xijejiminan.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210916215327.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/sipefuju.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/vovawomapijepuzito.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/45968439765.pdfIn PDF document text
    • http://it-hair.com/userfiles/94696821041.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/161498e926bd0a---44091732503.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/93542915332.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/doneseleposazisururasog.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317520eb6a5---93442252223.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/dfac8538a035ce7166783a3151d7c353/84582665965.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109022001006547.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///pazixugezalosomoziru.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614747150c90d---tanidodeluriwatut.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109052032065557.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210906043247410.pdfIn PDF document text
    • http://synowka.pl/galeria/file/2922591738.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/wozigagareta.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001225e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225E 19408 bytes
SHA-256: c4502075630835ff8aca4b8b32fd21fe2f0f59616a9b9f0754eadaa81d92d172
font_02_sfnt_off0001554d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1554D 10252 bytes
SHA-256: 499d1ec8be02c234a39ecd2e84a9399cf0212401baff49a61af3d9f65dd6ac96

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