Malicious PDF — malware analysis report

Static analysis result for SHA-256 5582d44a5179d744…

MALICIOUS

PDF

67.0 KB Created: 2021-09-01 01:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 38505b4f6c5a041b8256dcf4cf01dd1c SHA-1: 331989e1033113c8b80454c74132c5dc0d23a862 SHA-256: 5582d44a5179d7444c1cd822e0e9292cd031113a3fa7f2913115b60afd0ed9d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9664

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 https://laborke.ru/uplcv?utm_term=leveling+wow+classic+horde PDF link annotation
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160acc0f7662e7---wefigiruwifenaxopibor.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/7415740389.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7004a813ae---bemikabet.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/91647432196.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611543347fc18---zaxixuzilovaje.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/j85i7513un3kd1mauq4afj71aa/bujirub.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210530154608.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e9db0b5aa---90664566560.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/399ec2ef0d3d18c65111adedf0b548da/xopivaxa.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/1662250419.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/ja9l0s4sg3fhhjpag3de5k73ot/kuputaxegoze.pdfIn PDF document text
    • http://redactron.com/userfiles/file/fonutufajow.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/2594b75824e064f11a74ffe93e073d8f/58652834897.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/395b22d901573632e3a6ac696296d5c7/87437922803.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160940d90e35a8---1574538862.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/bovunuti.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/77293239522.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/jevanofotomakisenosono.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612b739c2be72---legumapinidofafarosi.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704290c1190---rolojozolemadazuvux.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703b0028084---zigisafazi.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/nuxavujemonawamu.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8546e8227---33614123957.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/43138633397.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35D 16712 bytes
SHA-256: cb2e5c06dbe0dbdcfb25fbc08e32422c80b225809e2aa656ac5248f80067a6d5