Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ea6db8d566ee23…

MALICIOUS

PDF

81.1 KB Created: 2021-07-03 04:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 054d0082aa83ab7999c6f74f048bba90 SHA-1: 49ecb301e152321421b41800cf4b2b7469fcb5cd SHA-256: e0ea6db8d566ee23641f125300bffb9eec1efcbbba0356e93ab9bd0d2bafa093
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other disposable hosting domains. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://huntic.ru/uplcv?utm_term=meaning+of+nucleoside PDF link annotation
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e465c19c94f6f0ae3e0fd78f9e5233a7/50898519169.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/jolefedel.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ce42e6a8499---debojobogunafuxometizavu.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/nijivetamejegedevu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/vozifatasun.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607972ce8658e---61470988688.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/ketakovarabobubofi.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/8gntc7m3tnhsu1eitihkco7u0h/nifumixoponexewi.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/165040cceb3785bcf1b18f40e3e2c04f/60633511709.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a449f2860---52714734921.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/791e2c0d9776f438d53a017f74771fbd/99140487950.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106201025346475.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082d9a743998---bupivakotavubajonepolu.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/88957114311.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/jitinuterawedevurigid.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/jemer.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2092c0d386a9e2948bbce481f314a9d4/vevofotu.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/7012928493.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/foxivisusebudatodo.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/6e7aa4fdacf3c138d28c8135c2989383/88180532132.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/8323754980.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/bbaa44fd0576a80d74fe76eeee25ce9b/giked.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/13730282972.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/golox.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098448c50994---99605696362.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/i0gs3rc4eqa5u0m8u74vs37nf6/19648237744.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_off0000d88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 10544 bytes
SHA-256: e6a2c2d94845e8db92aab8d94643d561717d760219d30cd8ef5795b0a49c237f
font_01_sfnt_off0000f075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF075 17156 bytes
SHA-256: cc711c7df8b810f102001f02186d7fb6dd7558cd83593c1f6fc72959eb7d0b1e
font_02_sfnt_off00011d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1