Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2dd96567d890132…

MALICIOUS

PDF

89.9 KB Created: 2021-08-01 11:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c88218ce6e9e6d2d0720410e38fd2284 SHA-1: 81153b04902612d63de019f52de5002c3cd2712d SHA-256: a2dd96567d8901321b65b68cb6f3792a418cf9f81496bfdf826f11708ddc500e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farm heuristics suggests the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=zombs+royale+hack+apk PDF link annotation
    • https://novsport.com/content/File/besejaz.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/venidadalun.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/jlgun95nh6ski7q279frfvsd11/10292976927.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d565dee67a---vudavigisijiroberijep.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/29pd6027hn53cdigse34v9t78d/13811082498.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/95272408593.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/15359398597.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105191915474325.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/kkttmvfl77aruq79fk6kn12722/degirunododenisizuses.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/a1f068fc6a02e17c4e5ea5878e4a5a37/kimerepupole.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/41b9b053a02dd0987be651ffb97ebf96/dozevikatujijilugodeguz.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/d6monvqrfjfmu1iigqakijcpi7/8187727646.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608377ae921d4---ruzimapufaluxuwevuvonit.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/18835638177.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/90721545160.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c7cf5c9be---40636201507.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/devaki.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d85853b4c7---85880074072.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/14c76d2811646f7de8151c2e2d7be27f/70277213636.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/rumevole.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b133d425755---zalexoxegabopikazixoxej.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f05ecc48---mavipupigorigowoli.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/708800fad2ebf8f0c2b419b8cf75211c/83117151936.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 17192 bytes
SHA-256: 68892aad93935323bfcb2f165877e60af927ba646570cb33c3f41c901234f3ef
font_01_sfnt_off000120d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E7 10656 bytes
SHA-256: ca1f8e473566c0977a48b0be6b5b104927575b156ca77fa362b50568a76be168
font_03_sfnt_off00015129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15129 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13

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