Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebd27b4a2eaaf0d…

MALICIOUS

PDF

218.8 KB Created: 2021-09-05 23:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4793fb925b911b6594d9c413a961e016 SHA-1: 76a757468df262f720895b2df6673a899865ded1 SHA-256: 0ebd27b4a2eaaf0d7ebe60a6431b8beeeed44a217a4958c0ee19c9b08cab728a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or other unknown hosts, suggesting an attempt to distribute further malware. The presence of PDF-specific rules indicates exploitation of PDF vulnerabilities or malicious content within the document structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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.
  • 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 http://vstarmp.cn/upload/files/20210617_192357.pdf In PDF document text
    • http://whewfamily.com/clients/12004/File/86582961576.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/59308411923.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/kesekigulapujijatisol.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/c5f6f424c35533a5ff7c8d33472f303c/tijimeduzo.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/71068848481.pdfIn PDF document text
    • http://master-br.ru/img/file/jurumirofam.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210801_0842C2686A311443.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161244cdb09f81---73507022735.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/karikejotuto.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/kagobovojiradoxaxawug.pdfIn PDF document text
    • http://leton.pl/userfiles/file/34626947089.pdfIn PDF document text
    • https://cheesykeju.com/contents//files/gixebazagarigexo.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/5287791833.pdfIn PDF document text
    • http://etre-belle.su/images/file/xuborobeberimexuxowenoke.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a54ea47962c---99809602098.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/68987280182.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb34d10b63---73020728125.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/jozubuzixox.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607feaa5d2e8d---wivurigezujiminasexonipi.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/if9rqifim9sr2qhm1u7rcm0e72/vokadipomowalok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=introductory+econometrics+a+modern+approach+5th+edition+solutions+manual+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_off0002ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED8E 23268 bytes
SHA-256: 8ab8da68eee8dec7c86af25c474944a0024e03f1eb4f365408b7d6e9d3952e61
font_01_sfnt_off00032a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A4D 11184 bytes
SHA-256: 98277f44435aee63def1260ef62945f62b0ca988ae1981c96b24cd6bfe9b3281
font_02_sfnt_off00034453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34453 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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