Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e5d687a3002f7a…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 12:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7ee84a87d098a91b393da3e0d81fd77e SHA-1: 7ac35aae516bd748c42707ea7e8daad66e1745ca SHA-256: 14e5d687a3002f7a557d85aba332067c578be87e2a05c9919b2a84a3e25564c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://infrive.ru/uplcv?utm_term=use+of+computer+in+hospital+and+community+pdf PDF link annotation
    • http://imcborivali.org/userfiles/file/gupoxololulodojerevexizil.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/debaki.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/53386568914.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/3518e2e9d29ee0f2ae53671d6d2b45f2/numidezenutojuvakuw.pdfIn PDF document text
    • https://digireg.se/upload/83289914648.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/rawavamala.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cca73cd62---wejilolezegud.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bfe343846---49908826190.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/1775066907.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/kj12njo5te950334u2n526cuh3/zosogolav.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/17873512741.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/21b6ff176ef7dff9b9d548fd8c1b800a/25554255313.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb874e573c9---2662801666.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/27632431011.pdfIn PDF document text
    • http://groupkaishan.com/d/files/77275900473.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/27418265906.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/45g2s7qs7iohu84dg26ttvnda6/16691981723.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/vetuviresiwonixuvada.pdfIn PDF document text
    • http://teraval.cz/res/file/55284747920.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/dgu5u021qfsp2fhomaa1cmojt6/jirozuvumosatoxosesuvo.pdfIn PDF document text
    • https://bachson.net/upload/file/54702608968.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_off0000cc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1B 17396 bytes
SHA-256: 7d789690624b9befa3e85409a9b81547e968cfa668495fcb36903b748841fade
font_01_sfnt_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 11108 bytes
SHA-256: c4a9597faa95f8af3e50aa19aa051fdcac54ec95c0c88fc6563814149c198aef
font_02_sfnt_off00011289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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