Malicious PDF — malware analysis report

Static analysis result for SHA-256 041bda3d2c84aac3…

MALICIOUS

PDF

90.1 KB Created: 2021-06-28 08:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bfce5411edfa3d7cf627f38a1c6efbc7 SHA-1: dffc3625831620aac04169aa3c0bd1f4e5de8d86 SHA-256: 041bda3d2c84aac3b6e550d31d307caaeaf0801da3d63303d24b5b69b76d7e52
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous links on disposable hosting and compromised CMS uploads reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

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
  • 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
  • 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://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087a14c1c5cc---fafaxepeval.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/18f8cdf349ae70b1fe80ae369d1fd1cd/lanofod.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/1483c9e977810b97f6c39be7bf4067ed/jirekemer.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/52684971246.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1e3a23af5---mubanuzad.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/guvetu.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/nsq7gh9kmbf4bq3g7um93ndeb7/77513003660.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/bbd78e38070fbb87d3c6f3c756acbfa0/newisaxoxo.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/batopal.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608407480ad49---razexaxumalisodi.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/9e052980129ce80fb234ab04e28a73f4/97194035751.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071ab89a2952---70049209083.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/3e25ab24bde2842a4f19aa0c3cba60dc/numedev.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/nf1i9v9mf68d3bb5lbas1vabs6/61961851044.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6a2201fc---76761838226.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089f549c5d2a---94017770875.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/38625689778.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/lifepugefuj.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/64827451746.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3kejlfr4tpmkupkcvb22a0s9ht/furomafa.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ad0b5a3a6---88150463099.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f16635a0f---resibowozutu.pdfIn PDF document text
    • http://www.manorbymajor.com/userfiles/files/rupabusiramufuzisokesiro.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160885da6ec1c8---93184285424.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/batefifidalowonut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=probability+and+non+probabilityPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11405 17472 bytes
SHA-256: 60f0c086a3542c72b892223016603d5dfa044a6291eda6ccf91f4a29e7f3177f
font_01_sfnt_off000141a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1