Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1717b04235c094…

MALICIOUS

PDF

93.0 KB Created: 2021-07-06 15:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b3985a5d717424aaf2449d6b8b22862f SHA-1: 20530792d77789d2617f6d88e1a9e715ae17e3cc SHA-256: 0d1717b04235c094a1007e5150459e5511b3e8fd363217a4e88c1200ca6e9d18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/tnkbgbb2g8fka3bbiq8iherb33/buxijifurekadatevamof.pdf In PDF document text
    • http://beastyenergy.com/userfiles/file/megebopu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/9211ca7abc0c00bb662b8c6c3d10fee8/gadusajaxutozuxebemo.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/a6892fd4cec45db5c3c6f5e03590bcfa/tusebiwejupesuzosa.pdfIn PDF document text
    • http://didopack.com/files/46370354479.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/tewadavoparepoburobimo.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/nevudipupunivipuxe.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/zupejexezoz.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/ed09174d2a10f3ecdb4c80b9f328941f/28368707808.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761f6cbeb60---99538096174.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/952911251.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/or6676hlnajbk0rtv49gf87rfm/mijibesemirokuponesifaj.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/7066381617.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ae75488b39c---gabilalawav.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b26fc2d602---70096502810.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/aeecd5e58d4c60b70b1165a6f127f4f6/zafupiraketem.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/logopapuxojotivudezowuma.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/52283822375.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/19349311193.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/fe14f453dc1f6749ba7a8e85655c837e/77068523449.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/48052934278.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fb72b37e0---69265457460.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/6535f4bf6e63543efdd56901ffcdff61/netagoda.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/sikajenibatanijezimutanaz.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3562d33c7---86998062210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=gas+valve+furnace+replacement+costPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 10752 bytes
SHA-256: 0be44a85cb2662fe23c2d1f70b408186f483d85d2cfc4af95dd5940a345a15b0
font_02_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 17608 bytes
SHA-256: 06cf5d1895388dc20963b834221c13d61617ed9d44d028d834ede18b68975ddd
font_03_sfnt_off00013b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B79 16516 bytes
SHA-256: 62f93bbbe6532d3d9bd266ef5b1d4b72c40783209a59d43aadc15da68eac5c7b

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