Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f48a332053cd2e…

MALICIOUS

PDF

82.2 KB Created: 2021-09-15 22:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e78ff9799a122d18f061a1a1807dfa36 SHA-1: 34a0eb15c51d71eff90ab17031debd7a9c6aac8b SHA-256: e0f48a332053cd2e72271077a0822e832f311e9c41c8116e6bf25f30aac4a459
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of embedded URLs and the overall structure point towards a spearphishing attachment, likely attempting to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=samurai+2+game+download+mod+apk PDF link annotation
    • http://banghetretunhien.com/media/ftp/file/67294433554.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/16810284434.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/vogejulajinibawekitofez.pdfIn PDF document text
    • http://xsteelstock.com/d/files/wivamese.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd28ccf77c---tunesefe.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161300a8c64610---48403704973.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/72971140265.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c9a69f0c8480f9173114f48ebf3f358a/78910853941.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/12s2c9bp0ogdpag3uq2fdqo8qf/23453347254.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161306a1b91a2a---jitaguxowoza.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109131309438936.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/tiravorawexixa.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/9a494a1c6d7d02f86a9de247dac137bd/xibetexelepasoxulilo.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315ee2e5a06---niwava.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16133b2a526a2c---fasuvamaduxilew.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/perumujud.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/7a62c5545c52b2b4b3df9f77a2988449/dubisusenatagolowuv.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/87478201726.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/73720485312.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/82276552080.pdfIn PDF document text
    • http://bdsductri.com/upload/files/sukeg.pdfIn PDF document text
    • https://stauber.lt/images/files/15743342050.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/4e7ee5238099eeec70d4706b45f6b8f8/jodotagurujiwolora.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/21904843921.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46085096922.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_off0000dfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE7 10944 bytes
SHA-256: 37225db7bcac4891f79421c76f7908d82da615e88dd83c5d9fb7a7a480ee96d0
font_01_sfnt_off0000f912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 16216 bytes
SHA-256: 34d7e71cc24beb7b9d8e31941b376ca1246158fee5ca6d3aad2e674991f877c9
font_02_sfnt_off000122f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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