Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0212aac7eacdcc…

MALICIOUS

PDF

155.0 KB Created: 2021-09-01 01:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d2ee4368ec2ca9d076ddd122020046a8 SHA-1: e69f13b77d5851a945ea9decc0f314b04a85aa61 SHA-256: 5f0212aac7eacdcc4a87f532457fdf5938758fb94b77aa4c763df50970aac241
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it is used to redirect users to malicious content. The presence of multiple PDF_URI and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of hosting malicious files on potentially compromised web infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9821

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bc817dc18---4885368721.pdf In PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/15237087287.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/12837828711.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/9deef8e27dc64ad74e38db5ec9e603a9/gutolebumomumotewujig.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbcf27716c---1340505031.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4feaaae67---96770460098.pdfPDF link annotation
    • https://likeevent.it/writable/public/userfiles/file/66120471078.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608373994f2bf---pezijijovawejimezimikaw.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/prebtoln4flt37aqp8t22qetg1/3084082338.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/8etbedmfh902ha4q6r47demj09/81733675125.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad3e3d5fb---mefakeba.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/79774e093abc792872f9f5d3507e7ff0/12150713754.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d25691e84e---47185219839.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ub4lmvihchc1ur4h354ugtjnau/vaxudapir.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/votezovez.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/99659970421.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/ladevavoxapabaregipizi.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160882659391c8---fawumoxidopodolejogi.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/346b87990f52bda5ea31ec3f47b9d644/nogutesojefuratupojikusok.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611338c7d0d06---19019933822.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/91782739998.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/53863365900.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086991e2411d---30543573228.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/50921613091.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3db3cd4b9---74478908812.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/a5c3c2989a5fddec07555bfde27a5034/kasotaji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=meaning+of+religion+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_off0001f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00020bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20BC6 10400 bytes
SHA-256: dc4d77605fd2ae50648434e82fdb216dcecc5eb66f28856928e04a5568eec76d
font_02_sfnt_off0002231b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2231B 22428 bytes
SHA-256: 77f4e9cfaa58b4e85f9c80af2cfaf1da31d65ca6afeb7149eaae721a7026c1a7

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