Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a479eab698fbaee…

MALICIOUS

PDF

78.0 KB Created: 2021-09-05 01:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0b489bfad31fc8fe8b5e870d8785cc6b SHA-1: b594a8fc872b3707bd99745fa12fe06c4fccf223 SHA-256: 6a479eab698fbaee43796f3364cc08d8232cdb837965d9fd6eaceb70efd64f52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. This suggests a phishing or redirection scheme designed to lead users to potentially harmful content.

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 http://jaika.in/images/documents/files/nitiwitogi.pdf In PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e55c203eadd7dba185ecbdae44f843b3/dokupevizidakikokan.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/66966201231.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/72007978996.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a82177646be---belitigopenejojixapaza.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/68702827534.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/66478391455.pdfIn PDF document text
    • http://lawngo.net/fckfiles/49965725095.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728c4d71546---42769861974.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210829_675B0A337951387E.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/8ltuaer2ei8bl0sbe6lha7f582/60572103275.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/bdekjeqhculpmb7qm70c0dpcd5/40553833565.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/ritedirenawisomufuforak.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/91099035023.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b183c4f2097---feguwogobusetuxup.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bd4f1cf80---71567257213.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160f55fe1cabef---53027207709.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/subirakowafusaka.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/0bc4d284ff94353f4903baed1dd93f16/nerona.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609092b5b89b6---53870155310.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/17221451243.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/12915af525aa521f6b8e81bc803306be/fiwugegeboluma.pdfIn PDF document text
    • https://premium-house.uz/images/file/popuzefudutiripuxenij.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8c1e3e538---pedaniruwuvorak.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/v0k23rbfu58eatm61qc6g9nu4i/guveduxiwabobanigu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=inference+worksheets+grade+4+pdfPDF 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_off0000cccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCF 17136 bytes
SHA-256: 8f992bd1fb0a215b1997536b37674f6cbe9d1c3dc460fa79fc9d4bd9bd4c38aa
font_01_sfnt_off0000f8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F6 10968 bytes
SHA-256: 8cb95214df18334b10aa2da4d8810da88fb93d3d0d5ead08e1b9d9087bc61b9e
font_02_sfnt_off0001124c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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