Malicious PDF — malware analysis report

Static analysis result for SHA-256 96028466f9a5474a…

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 06:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 73ef6f3db23f1fe886676324f37fd389 SHA-1: a7018f9473af5446a6cff6b0e7b1ee0de5f4dfbb SHA-256: 96028466f9a5474ae6cf4b75a473b88ea7251d0494e7869f4839b3109c9a41f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://archism.ru/uplcv?utm_term=2017+chevrolet+malibu+manual+pdf PDF link annotation
    • http://sibinetweek.ru/userfiles/file/13292895168.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/d77cd0ad07ce92ba6a4e42e2f3ea0a80/mikelemagitezomupu.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/dewukus.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/ridaw.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606f34667a025---dajulidosaxiriromulo.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/69d690a9535b5c753f2776abc532a408/rinugelurewanubevi.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/km1e5so55iq1k4l8e0vr0qge5c/defupuxezojuzilig.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/7ab425f2353e8e26bef25af9fbb0c7ba/daxejijebunepifevavi.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609905437214b---pojefef.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161087cac72539---9029037079.pdfIn PDF document text
    • https://somogyplusz.hu/files/41483628837.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/2585f7be24e7aa79a20951bcedb8f723/sidokokorusi.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/wimobejokotux.pdfIn PDF document text
    • http://omg50yrs.com/clients/6/6d/6dc66c997efb3e4e8ce6e6e7d0694e91/File/99172111791.pdfIn PDF document text
    • http://nature-revive.org/files/file/250243374.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa7100dc5d---guvovokonolodemol.pdfIn PDF document text
    • http://alhs1973.com/clients/64426/File/97467333919.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/r2dr7ergir5qv87gulrcdtdmk4/razelanol.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/93570799564.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f526b97159---38892937011.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c5522f018---3849094383.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ti3uhkqmaf7lnr0qfpnrjrd6i7/gasijodemabokobed.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109022032361217.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/55267140382.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_off0000d380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD380 11268 bytes
SHA-256: 871bc5f5ead336ac515128877d181f8567f7f32a97a0ee83a17864e7181ded0a
font_01_sfnt_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 16480 bytes
SHA-256: d0c838aeb4eefcc7cb4cade3f7616caa57f47d9e284be527f3f5639e06765aab
font_02_sfnt_off0001186a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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