Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac00ce9ab81c56e…

MALICIOUS

PDF

79.5 KB Created: 2021-09-12 14:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8f6dabf9d05a2ff4131b3beda01c2d53 SHA-1: e80e7dbba50dfa270b5bb0bba699eb99153a17a0 SHA-256: 6ac00ce9ab81c56e73e6cd38b65ccbd51c5a26840f6b39ed21e0a5397c08ea86
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to various domains, including compromised CMS uploads, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://www.bash.cl/media/file/paropejotesunakedapowep.pdf In PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347dc3e44bf---sotekoniwijugewenuguv.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/totonanewudafikekivizumiz.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/47041112060.pdfIn PDF document text
    • https://goodline.by/userfiles/file/93772511550.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/xowenufiwuxowedanadonutot.pdfIn PDF document text
    • http://northcity.rs/slike/files/43548009213.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/bewejunewutunukimaf.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/ladobosodokatezivum.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/movenodomalapazoxe.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/46597418020.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/sexipok.pdfIn PDF document text
    • https://palet-school.com/files/files/27510240163.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/tuwojaxu.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/65b6bd0170f711d16e180df8f8befa72/26828597250.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b99335fff---2049645506.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/79426677747.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/06ef625b9c4db17bcb81c6d44f02d5f0/bipevedanuzadanode.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/49465405119.pdfIn PDF document text
    • http://hzqzg.com/d/files/88535267577.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/lalotiresifezi.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/pojagilogela.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/32412987732.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/24392301319.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+connect+iphone+hotspot+to+laptop+via+usbPDF 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_off0000d41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41A 16824 bytes
SHA-256: dcbdfd780792cba2a4f2e4f0c3fbf223e92e40009dc349d8a00965419391dd90
font_01_sfnt_off0000ffa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA1 10756 bytes
SHA-256: 2550b22b7b818ba5eb2a5e19a70c4c3e45f67cc9b9e8034f61b4327f1eb6810c
font_02_sfnt_off00011820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11820 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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