Malicious PDF — malware analysis report

Static analysis result for SHA-256 8249847299e58da3…

MALICIOUS

PDF

78.8 KB Created: 2021-08-23 21:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3fce2f5de51b5ff607a72dc8e376c7f4 SHA-1: 329b4d33bcaa98834b88703a89ff8d3a7b0bdc34 SHA-256: 8249847299e58da3593e779fe59e1a08809f260c71b8c83fdc7471a796f16d36
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised websites, suggesting a link farm designed to redirect users to malicious content. The PDF structure and the presence of external links point towards an attempt to exploit user trust by directing them to potentially harmful sites.

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://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/tivulazapadozigar.pdf In PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160768708c031d---37506587851.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/7fb2lmt3ru3kdagpnb5joh3cfe/tezefuvetoxudo.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e53b8d9fa1f---tuwifitiluxi.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/lefosigujawaje.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/xesok.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab848d4bd00---55265093254.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/91545583823.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/39089870759.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/zotokebupupime.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3ef0b20a8054db6d1704caa4ccae5621/sufumokonod.pdfIn PDF document text
    • http://righetti1970.com/clients/872956/File/82616231485.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c48934eac71---67706849175.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/dikedozuzumada.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/52743435cd6a3c970acf21c69ad8a502/farusalanobo.pdfIn PDF document text
    • https://senfina.top/uploads/files/50339115465.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/kupukuwijawuwotiku.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c208c9871fb---7407197564.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d57911dbbe---tamepomudu.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/wosazibitiwuleziparere.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/89ipf3ugrom1mepg8co8l40cop/wuworapupemamokon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=fifth+wave+2PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD578 10024 bytes
SHA-256: 4dc2e6d2994bd624ccd6e2d6f0ae4940286536d4319c8162ec6112e743e74d2e
font_01_sfnt_off0000ebf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 16712 bytes
SHA-256: dae9df3cb7d93888b9c767e9dfb137649f7cb4fc636bd4ad4329661c26abf985
font_02_sfnt_off0001170b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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