Malicious PDF — malware analysis report

Static analysis result for SHA-256 032126484306ca56…

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 19:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ef871bac4b1ff483e1ee62fc79ae1fc4 SHA-1: 64ee4410951267a724b81cf7de978b412a953952 SHA-256: 032126484306ca56c1d896770217b5036bc952d595487a4a7b725d83da5dfe13
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/cf140c539ac5a0f66703cada5ca83eee/binodufusabebon.pdf In PDF document text
    • http://rpsbchamber.org/editorData/file/kiteropot.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/12561934586.pdfIn PDF document text
    • http://apicn.net/upload/files/49285051342.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161348a5262852---55217991999.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/fajarabemin.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/wupasifulitulalamawufo.pdfIn PDF document text
    • https://tmtteks.com/files/zivudidomire.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/76600644819.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/jexozalezasosefupowimok.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/lonikuror.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/guragewijokogajajamof.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/99164821407.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/serovajusizumiliwe.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/78819259086.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/jumedix.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/jigebexiputufis.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/dukoxisadisuberaka.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/xosowepowek.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/65461725417.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/3073288499.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/xegoxujerazazugologokos.pdfIn PDF document text
    • https://ximangcampha.vn/upload/files/10225955526.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/ribedeguzolisatafes.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/waziwepex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=old+videoder+app+downloadPDF 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_off0000e116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE116 10296 bytes
SHA-256: d1fa386a587e97e319ee4f74b55db37169e1c7567eaff4c256403103b2abefe3
font_01_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001106c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106C 17996 bytes
SHA-256: 45a1537b98a3f5429ac41716c15b768ffb28a6c65b9cdab176bd8e8a7634308e