Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2e6086fbb5ff19…

MALICIOUS

PDF

73.7 KB Created: 2021-09-04 02:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 31767e683f4d55a5f4afbde8971cdb57 SHA-1: c0567c3982192a8d585b6c42f64e80adef5f44e8 SHA-256: ce2e6086fbb5ff19c32c331217ebcd00495b5109da5c2b6f9d3eafd34e334654
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of external URIs and link farms points towards an attempt to lure users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ebooksweb.net/files/file/karivibanokiwesom.pdf In PDF document text
    • http://ohappy.org/userData/board/file/bopikekodewavos.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc04fa9902---85738765698.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/3168168059.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/gvunmv9d8pnh3tirghsparcqe3/76086256269.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/xesedetos.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/78879583997.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcf23e88aa---domamesoduforubiraxa.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/95785575925.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/xakomepederaxaz.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/2fmvibhn3e0i58harhglipqijn/bufekugofigujikifa.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da58a638fa---61965294749.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/18129797698.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077473bbd3fe---tufopedotuladonutafag.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/gisigoporefunufanuvono.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0251b18d---vewupilowevuwizarukugisov.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/31892165554.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/18kcdq8v3eeck971442elvc348/9522044797.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/23260357494.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/74495156032.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73f6527bff---silovonisilofowoxojame.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/sasurasekaxekil.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607778f8cd1e1---52569407888.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/51957958632.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210815_D5D5971DD71DE65C.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=key+concepts+of+economics+shankar+ganesh+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_off0000b9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C7 11220 bytes
SHA-256: 8a0a9095bbd2dba7a9064fb4b9060c3928e6c667920ca80f06ee16004f1cb262
font_01_sfnt_off0000d3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 17148 bytes
SHA-256: 2908884732a18787a4f5abd3dc9bd8a1b4e385adc6bf230e4fc5195b350adf80

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