Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce333bb148427a1…

MALICIOUS

PDF

70.1 KB Created: 2021-09-25 04:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7b610cedc17255ea46d6691c35437722 SHA-1: f3c5c56232f711e658e0963b28a98eeb9330925a SHA-256: cce333bb148427a1d5261906fef975d3b7e895c0c06e91daa1de17586ec77f56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to other PDF files, indicating it functions as a link farm. Several heuristics identify these links as potentially malicious, including pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution by redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • 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://pistant.ru/uplcv?utm_term=football+player+messi+full+name PDF link annotation
    • http://wonderpanel.com/app/webroot/img/file/63378514842.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/gogelabawenonoropidawo.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/51560936157.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/83775998401.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b507e0f9e---45220344577.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/fojirijilu.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/45769184022.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d597641e1d---wusadodizinixufuf.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/divepiki.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/58042910149.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/xusowimov.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/0169f5c33b140f1d583bcfa6c1f516fd/rinamojolutilavabelevi.pdfIn PDF document text
    • https://lanegarrett.net/userfiles/file/89800312722.pdfIn PDF document text
    • http://ufcnagykanizsa.hu/userfiles/file/3541313282.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/89995525233.pdfIn PDF document text
    • https://negaratoto.com/contents/files/62718160758.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/41189544645.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/xejuwivujevifo.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613907ae767c9---48952753182.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/79993116942.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/konafapedatu.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/27490643221.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/80388054448.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/93046665223.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_off0000b2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0D 15320 bytes
SHA-256: 6da87543a40ee93a98ffe9651c293958089916108e2db52aa371f5d576917147
font_02_sfnt_off0000f197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 10852 bytes
SHA-256: 8023437b7cd3cccd1948a5b00fe0422348d8b7921d647b365702dfbdfc4f8e9b

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