Malicious PDF — malware analysis report

Static analysis result for SHA-256 013ba00874a6b93a…

MALICIOUS

PDF

77.3 KB Created: 2021-05-21 06:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a3175cddf744dfb7a2d904666f73cce6 SHA-1: 2288167bb349a0a01cde270e04c13101421a5715 SHA-256: 013ba00874a6b93a7936e7a2f4ee69d977c9350aa220e9fd74bd21e9cf0b4863
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The document body, though partially corrupted, contains text related to movie searches, likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=ver+pelicula+troya+en+espa%25C3%25B1ol+latino+online+gratis PDF link annotation
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc2c62ab08---rivoxezu.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6e23058da74377099fdca06c893e3906/gulel.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/04b210f3885d80724bbe8950eb632501/tafigiboboxo.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/f478d3a26e34a3b0aae13f7f0738de6c/zexupadutujig.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/ja3lsvh967mg9311nsc2g317n7/19183053135.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/23912c0329f92c0d5b28bb34cec25807/berafeta.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/16343349624.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160999977ee42c---15133407068.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/fjopjfc0rd10kq96eb34bmlsu6/81868025218.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b3997787f02b70652dee6a2edb412f3b/85007363124.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/89867863679.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba3a8e5a6e---7833313548.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/01827101de422881fe46d605f510eb65/dafanu.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/zoxinezuzinabejujo.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b2c3201ae410675e20fb333290e3a938/74671223578.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/369b196fe400527d91f758b2d843b2e7/sujawopil.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080074e0461f---deguxejix.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a68b0ae1f07---likiguvefiviredo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000d946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD946 5380 bytes
SHA-256: 46167c88b607f78396aefc95d466b286983da87c56330343b2905e82e82f5454
font_01_sfnt_off0000eb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 11148 bytes
SHA-256: e519e68257c9bb71968299a520d9fb083b4abb1a6b73ef1717ca28138755e54e
font_02_sfnt_off00011044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11044 16076 bytes
SHA-256: d286e8b4d1cdafc5f769987bdccf7a6368ad55d0d3b8f98fd56bc2ae223999f8

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