Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4cc75ecc7d4b13…

MALICIOUS

PDF

82.8 KB Created: 2021-09-18 22:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4d2d3beb41da62e9812a3a18eb0ec3ec SHA-1: 5de3587e34c9be61f71d19c5334ae1bb76814c1c SHA-256: 0b4cc75ecc7d4b13177fe06751711260f02ba34df8bae9f4a320070e36026bc2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=the+owl+house+episode+18+full+episode PDF link annotation
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/rakorenidavubitanasifiwaw.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/36797614028.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/novaxanajukovijaw.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/13559982491.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/lemologopamuvawejoxidix.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/16299343236.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/favoxivuvavowanenunozef.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/zenipujoruseloserad.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613005d0347d2---leboxuk.pdfIn PDF document text
    • https://pgprojekt.pl/Upload/file/5358147759.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/16746659976.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/17206619405.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/34612204313.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/35928059056.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/2qdnrlblbj6rj4cbdj4lg623i0/tixonedimimikap.pdfIn PDF document text
    • https://petikdaun.com/contents/files/lebizetibibudexanaxu.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/60203816799.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/59862563676.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/gorulitobudixilajinofixol.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e3f3817e9---wulaxadovazefotif.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210911055745_wb3g0e.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/61568480095.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54165755696.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/95166289199.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/40630949307.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/bowatirewulidasofiked.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_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 10540 bytes
SHA-256: d6c9c6b95cb89b0013c2e509ce21a20573c0083a225a76d0a9470df4529a69a8
font_01_sfnt_off0000f8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A5 17124 bytes
SHA-256: 66f38f6f8efc07438f3ecb5f740b27de0c4e7616c28418b084a7735fb033d156
font_02_sfnt_off00012515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12515 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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