Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d64402e15ce1889…

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 16:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 806ea7d8190d2d001dff93cc4b686084 SHA-1: 371e31328bd0a09cc6e2cc8807a7629bd69a0d2e SHA-256: 2d64402e15ce18892eb4343f3ca79baa6effc53e914f30aeace968a0980da2ce
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to various domains, indicating a link farm designed to redirect users. The presence of ClamAV detection and ML classification strongly suggests malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of exploitation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=plants+found+in+tropical+deciduous+forest PDF link annotation
    • https://cuacuonbentre.com/upload/files/87744998703.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/pixatixebejetavuwexuwoz.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/wenotedurubezowoxorat.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e499ed821---kemugasenepotusujigaf.pdfIn PDF document text
    • http://familiesforfamilies.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/96602896421.pdfIn PDF document text
    • https://zlataraburmevuckovic.com/files/97473986393.pdfIn PDF document text
    • http://4bx.pl/public/file/benan.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/43514695397.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/68650833478.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/45f6bc284c09d13fa6c0cdfb64db9bfc/gisikabomukipitusew.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160edfc38bfa94---58633398876.pdfIn PDF document text
    • https://loctra.net/userfiles/file/76347681545.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c6ee757d6330773f91748067be67dbdf/givegevujebos.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/fumekorotu.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/luxuzelupepofa.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8f8f2f774---karefegakaxubon.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0e0919d71---49173458850.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/wurupagure.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/nomuto.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e7e8bb7c7---xamewawogaxuzaro.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/xituvu.pdfIn PDF document text
    • https://aromamarketing.md/img/files/lebarukix.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/getagixemapufasisot.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/lifij.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2a9043bb3da32ca08455c4dccae9cfe/12833696107.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/74232983095.pdfIn PDF document text
    • 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_off0000de42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE42 17568 bytes
SHA-256: 1047c0c591997b9b5e9a2929b3338bc9880d6c8f499b876ac87f4fd8b2f01902
font_01_sfnt_off00010bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBE 10712 bytes
SHA-256: 30bae485fbdabf065f2432b72c62ea351285fd2ba520bba7e0ae412c84f6d711
font_02_sfnt_off0001247e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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