Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceef017f9ea68bbb…

MALICIOUS

PDF

82.2 KB Created: 2021-09-08 12:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0d9b0c5533c5a191313fa04a710584e0 SHA-1: da6852782f87e0bd56e1fef7e00770c421dd48d1 SHA-256: ceef017f9ea68bbbdd2b4f7340d0198e5ff3c961b25bf03d226c50bd96a6e976
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs, several of which point to compromised CMS uploads, suggesting an attempt to lure users to malicious content. The presence of multiple external URIs and a link farm on disposable hosting further supports a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://theeultimatenetworker.com/ckfinder/userfiles/files/65437622725.pdf In PDF document text
    • http://cx-gl.hu/images/files/32609282482.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/16903044646.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/161065c9b068df---81156432590.pdfIn PDF document text
    • https://facades-metal.ch/ckfinder/userfiles/files/xonivunuzisufet.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/17190197.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/12812665268.pdfIn PDF document text
    • https://lasanisports.com/files/bofadepubu.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a7b005629---zalufe.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/96315695175.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077211c4d6ee---jatefonuradozikox.pdfIn PDF document text
    • https://computerzone.pk/file/zivewav.pdfIn PDF document text
    • http://finchamauto.com/pics/pigolokiwodugufomodutemob.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/nalamuropujarumediz.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/ce021d7467f35673853194236368ca7f/56815620232.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/xegovefetepanofisefe.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/39907829a157b2efcfabd1c01655bc4a/xabumam.pdfIn PDF document text
    • http://aps-mes.com/files/file/99468241273.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/9497463342.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136e1b5de6bf---revogivopenarojewamapoje.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/18981199678.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/d34a8f76a7ee16230e601935bacccdae/zexapaxulilema.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/42965966490.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=el+manual+del+guerrero+de+la+luz+paulo+coelho+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_off0000d9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B7 10852 bytes
SHA-256: 7bbe5d98db61784163d91c71bc0beb4b5a7972ac8c47c762298e7415e54ebe5f
font_01_sfnt_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 19376 bytes
SHA-256: c754988502697669127195d0d47d889b83ce637608f07f24d572088571dc87a2
font_02_sfnt_off0001232a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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