Malicious PDF — malware analysis report

Static analysis result for SHA-256 3202b454ec3c2119…

MALICIOUS

PDF

85.5 KB Created: 2021-08-11 04:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f180d13bba8b08def49d03256addc29 SHA-1: ee530a0be99505078c284dd7d0cc3a77fd741cea SHA-256: 3202b454ec3c21198eaa1746ac9b42527437d31873f554a89725fc3347c8e1a4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to WordPress sites utilizing the 'formcraft' plugin for file uploads, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the primary indicators are the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704f1bbd192---xenovi.pdf In PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b72d25b6d2c---12290162700.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76f0e7d5fd---fawilixodotoset.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/fubojamejorakezu.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/58bb5f7d0c1c24aaf9241a22f9df0430/juwat.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/wuraxiseg.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/v4ar19e552as1jgd5vbc329ml2/45363353475.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab676605b93---sebepedakop.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/lqso4mn1tbhfmivhe0oqp2ltg2/volutarimumubebapos.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c1494606f---tuvugiwolisawipigovuvogu.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pakaw.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/53923484937.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/setubejadopakujolopizum.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/4981a2a47be7f1b3ec698e7ffc60a2c2/vimifazapo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca37a4487f---96805515717.pdfIn PDF document text
    • https://advik.net/userfiles/file/teropi.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/3e84f2dd80112e1f55aa58665fba7e46/viximivugisatigarinitikuv.pdfIn PDF document text
    • http://zenithmetals.com/files/6288550002.pdfIn PDF document text
    • https://qnzar.com/files/femoba.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/5969794385.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/77168027097.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608081f16cee7---2461979053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=what+is+the+theme+of+pied+beautyPDF 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_off0000eb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 10860 bytes
SHA-256: 4ab8d8683100354172e8a4c042c314291a6598efed36105f38150aacdac06442
font_01_sfnt_off00010454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10454 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C66 17288 bytes
SHA-256: f8ea02ae37d5d24b47f62c0e12113271c62256b1927d12033a74a224538fa326

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