Malicious PDF — malware analysis report

Static analysis result for SHA-256 e040f0c674be9020…

MALICIOUS

PDF

79.5 KB Created: 2021-09-05 07:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 75cd0d16d531b4717ddecd331d1c0c10 SHA-1: f21a9547749945029d34869e68c8fb8c0de043fd SHA-256: e040f0c674be9020c4034bb65087fdb77721aecc04e722079a927055ec158b8a
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution via these external links. No scripts were extracted, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5fa93a4da63c29a3946b76915960bf15/98360632912.pdf In PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f54e32800022b11eb789abee640c4b0e/podisudibojezisavebonuno.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/88467001267.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b6e66c2fd---47824561072.pdfIn PDF document text
    • http://mebco.ru/images/file/64385180531.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d245d3eaeca---girom.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/41868502459.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/xabivaz.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/depupi.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/17995365451.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/ruzoruwarowugul.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e8b06472e25---donamaxiwedipiwilasirumi.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/9923794135.pdfIn PDF document text
    • https://norservis.com/files/files/31523504276.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/zaxotopagemiji.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16078d1d0963d3---pejizasoxevuritof.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/tqpjus96qn2hbqeri34rfsrumu/tixadoxonamu.pdfIn PDF document text
    • https://masukpt2.com/contents//files/65359917577.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/dijevewuxuvoluvemonej.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/54668019975.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/d3af49fb8d8561b84947e21eecd2c7b3/wipoxupig.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609c568f94826---49253742663.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160911fc9a6808---ririsupaze.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9d17a0684---pikek.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/27038566567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=asuhan+keperawatan+pada+pasien+mioma+uteri+pdfPDF 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_off0000d30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30D 10976 bytes
SHA-256: 556828ef5d63a138fa5060d2684707d289a1992cc487a77991df5a0e0b69c724
font_01_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 16608 bytes
SHA-256: 2a60c95607816c558adb9b4d01e810f17436d9f202fc9125af33945178015a38

Open this report in the interactive analyzer, or submit your own file for analysis.