Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e8a4a72ab6c18f…

MALICIOUS

PDF

71.4 KB Created: 2021-09-04 09:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2cdf6ce36717eea87a17830127212f1d SHA-1: 1c251984cddaf75f0f7e2ebcc4959a6fd82e863d SHA-256: 60e8a4a72ab6c18fbd4aca0910f33127474c9e25d13a2e98dd5d3e9e74add79a
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, several of which point to compromised WordPress upload directories, indicating a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a malicious PDF designed to lure users to external sites.

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://artgallery.devctn.com/ckfinder/userfiles/files/xobetokisaranu.pdf In PDF document text
    • http://duda-tech.pl/dudatech/upload/file/50600638229.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/bfab2d9b2ac3cc5bb8ffd5b3b049befa/16535594153.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/dc02c3cb9301c7e30a031edd083ae82d/fenizagi.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/37176106656.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/57013445726.pdfIn PDF document text
    • http://vtaky.sk/media/file/vizetoroviximemolur.pdfIn PDF document text
    • http://asfalon.com/__files/file/86619956658.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/37020820123.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/jowunuluj.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c8c4c213ce8e451e3870501685b0a2a4/buteboxe.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/88508355474.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/lonoriziletasiti.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/pafilijugojewufotavav.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/6l9ut7pq1f9t6q0p1cu4dgh3m5/26458405845.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/41507972865.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/95516488866.pdfIn PDF document text
    • http://dakmet.pl/upload/noxolewikaduwezepowikime.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d172064ff---sawovajikikazukokivoxek.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/tisolijomipesikox.pdfIn PDF document text
    • http://abpaluso.com/upload/file/moluzapewubefopivi.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/54650186051.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/bc0d337edf2ae08f05f1b53f539a2936/papulagenosodurewu.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607266a30d3f5---7555947376.pdfIn PDF document text
    • http://jingchengs.com/jingchengs/ckfinder/files/20210828200556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=telangana+money+lenders+act+pdfPDF link annotation
    • 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_off0000b801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB801 15328 bytes
SHA-256: 09105e1f1355504326d9fab521cb515d769eaeee14cf5790bac1f5ea069d6afc
font_01_sfnt_off0000de9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9F 10948 bytes
SHA-256: 9eedd67e8ffdb22f3cc6d2bd0a05128d12197491662ac3ca3ead6bcbd5de0a32
font_02_sfnt_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1