Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee9db156eabad68…

MALICIOUS

PDF

79.2 KB Created: 2021-09-18 21:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8c2026898693f5f2ec0881112c003af2 SHA-1: 8614ce6c9912d8b373e28073ca981c43ba1733c1 SHA-256: 0ee9db156eabad68bfb94a476baaa94bcdce4294c96e9aaa7ed4693f32a5b243
196 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, with specific heuristics indicating a payment redirection lure. The document body is heavily obfuscated, but the presence of external URIs and a link farm on potentially compromised or disposable hosting suggests a phishing or credential harvesting attempt. No scripts were extracted, but the PDF structure itself likely contains exploit code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://signos.larrialdiak.es/files/galeria/files/bixisibi.pdf In PDF document text
    • http://studiolorenzoni.eu/userfiles/files/55133406869.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/6974270364.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/xavokali.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/wezovedixezakajodofek.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/venoxikisotanilekikag.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/251402488.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/zawanokudinoguwuzoxe.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/74282082137.pdfIn PDF document text
    • https://kawanmto.info/contents/files/55612039862.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/2f0f4603267720a0c1f9fd1f87027ce0/fejapedobinaxepoxomodizi.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/26536942136.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe56058572---zometusi.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/xanubiwiwi.pdfIn PDF document text
    • http://ormansagszive.hu/upload/file/97340955334.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/karutizoj.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/47475757272.pdfIn PDF document text
    • http://proxima-design.cz/files/file/kitazodi.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613344335c056---sujadojusepinarotumomuf.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/nogesewamabarazo.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/78963774945.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/rovunivi.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/bubuxadipodonak.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459c6fe7fe3---48896604611.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=transfer+apps+to+new+iphone+from+androidPDF 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_off0000d1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C4 17080 bytes
SHA-256: d131acfc77a8380daf86afa696b8af62230be5885cea43c7d9de4536bfc16fc3
font_01_sfnt_off0000fde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F9 10764 bytes
SHA-256: cda39b5e5e905e4e97a6abb12989c17d74c374c71665d3f6a6579fe119e5ec7e

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