Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32d510a7465f26e…

MALICIOUS

PDF

85.0 KB Created: 2021-09-18 20:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f2f7b407946447844293f85b0cc635d1 SHA-1: 0a0046a6847776bb48fb6ad29939dec92b00b2a8 SHA-256: e32d510a7465f26ea8afd16456404bc74b3fdf80f4bc21cc873ed1914af175ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple external URIs are present, pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF structure and embedded links are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=video+calling+ka+folder PDF link annotation
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/7c0ee363e060c7270f775a72cb59d85e/39142512652.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/povaderutonarojepanuxivir.pdfIn PDF document text
    • http://ladna.pl/user_images/file/nomilodopajetusowinuz.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/movojosasulila.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/pejifanopubi.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/62797144376.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/juvifo.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/makigilujuvo.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/26509293259.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/mifeteforo.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376f190aab0---65521830148.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rezimuxexubabalugejorul.pdfIn PDF document text
    • http://surestegc.org/documentos/file/46524609254.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/29928003706.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/98726299999.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/77558289580.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/28540275252.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/25482825066.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/kidekakenewatinevavatiruj.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/nugux.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/52483154178.pdfIn PDF document text
    • https://akvaguru.hu/user/file/xawaweruvejo.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/57551753300.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386d879537f---dotokamujuwos.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_off0000ea2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 10444 bytes
SHA-256: 241c02df987acc11b94deeccc1b7a02a50f213c7807be231ecbd495d28516385
font_01_sfnt_off000101b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B5 17404 bytes
SHA-256: 8839c7b11a764598d75ed86aac35bb5da99f95b4efae19f86cfbed7c0100fda8
font_02_sfnt_off00012e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1