Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e1f2e45457e533…

MALICIOUS

PDF

52.6 KB Created: 2021-09-08 12:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c201437ae7b79d6291a94300cdc1e827 SHA-1: aa0ea236e643c3fe6269dfcc08b9a2dc99b4936c SHA-256: d0e1f2e45457e53308858376a3d75f53cb8cebae83f13d92b0837bea20537f80
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites. This suggests the document is designed to lure users to these locations, likely to download further malicious content or be redirected to phishing pages. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8640

Heuristics 5

  • 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
  • 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://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/161315b1db3dda---kotilumixujeta.pdf In PDF document text
    • https://contabil-fiscal.ro/mm/file/69544758336.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/0qg60bi398k5tjjer756e5tqe1/34289162435.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/9881527306.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/kelorowuverakutofivomikad.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2bf11f9b6---51067183706.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/nibaranewilabeworemoxepe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f27dd5422e---37806168240.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/21158430869.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609093f392e7d---kesabagitu.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/gejasigo.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb3d71c1d---96118338714.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/e303c84a2f6cdabad6c2d634cc8d7c00/68495291738.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/gaxiravukuwevane.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/83875423338.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/bixakirikebanabefevajen.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/kevowikazolito.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/zenukowoberelara.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a540e67a9---dowetizagabonamevisepofi.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/13229387529.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/dabadodejetal.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jamujudit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=russian+english+dictionary+of+verbal+collocations+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD15 11364 bytes
SHA-256: 823d8029846a267c218a40bdb30893db6f27a7a2be5dafb526d82b614bf7e55c

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