Malicious PDF — malware analysis report

Static analysis result for SHA-256 269b3220ddd9fdca…

MALICIOUS

PDF

79.9 KB Created: 2021-09-09 11:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 807b94f014f8fd9392bc7b1c79dd2fdb SHA-1: 38bb6b415857acf6ae9e0885f6a47c5f7e498f2e SHA-256: 269b3220ddd9fdca6d3d78b1d8ee3c2de675b60d0df88c92772b4248ab8dc614
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://coretry.ru/uplcv?utm_term=solar+movies+online PDF link annotation
    • http://xlpe.net/Images_upload/files/wositagajebegozigamaseg.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/xuvoruxusitukorud.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/55345503832.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/kulalujazof.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/48284987565.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/pavojixudekewinasaki.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/mujukunifemuvun.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/sezesadiva.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109062147077207.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/k957k3tqsvdag7am8nfkfsuf1r/32946264350.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/dulofekumukipepibupek.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138026ad68e2---xubobupakelon.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/90023493330.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/moxinitaxikizawiw.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/wekowuwi.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161382aa694d68---70361352984.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/b4c061ca78cbff09b8dc3c3643f8f54e/doxusi.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/54608083236.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fc9d35e32---togunusomijate.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/63390707820.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/naralexe.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/gudozujisevilewevuzolak.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_off0000d602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD602 17472 bytes
SHA-256: 0cbc0f29c81e12f2457615bf76c3e670ed56987ac1a74475f92e1a87e5c4edb8
font_01_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 10312 bytes
SHA-256: 5dc1547d5856dd131d71bf7baac7f7b3422396738d2490b0159e984680cecfb0
font_02_sfnt_off0001199a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1