Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d17b888763383e…

MALICIOUS

PDF

94.2 KB Created: 2021-05-28 18:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1b56714d7596ae1aae86229fa6b3d0d6 SHA-1: 04c99d5f456c7da43467e63889c3944afe542b96 SHA-256: d2d17b888763383eea0841a956c53731abb11d06f43859e76d1ae742f7f8dd7c
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. The document contains numerous links, many hosted on compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of embedded URLs and the nature of the links point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=salary+of+a+nigerian+army+captain PDF link annotation
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/e0aa5a4f8a500a7feebddc5e4aa3c3ec/85220747449.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rfpekmvrjir9m8p0o55ns2eva7/35276019729.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c68f7e96c---57460180161.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/aa921b74ac2c41489f2d9ecd3cec95a2/32353854385.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/d9446da1b92c2c72ef9f020a84c1f628/pevazagovokabo.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/07p1hpt70ftquvgdenmi7r0fps/37790315295.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/94407799093.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0db91d907444ca8ccd39f03f295d099a/17051117000.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/58548421098.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/47702869063.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/9c0cbcbe336eb9d4f2a88598a25a57d5/zazag.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/59c4d82697068d1fb1315be8138c5d5b/61879940579.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/83rvb4r17dt9t37r78i1g53dua/waribazopalupevakimisopi.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/9295187401.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608777b519c7b---baxeruxotono.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa5cc23197---setapejupozipojewixakunu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D5 5360 bytes
SHA-256: e6a5a4f50d0cf7a7de86ce0281e51fb4854aa3f3ac980dc534c84c0d47394742
font_01_sfnt_off00014510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14510 11428 bytes
SHA-256: 89b7a938f5defeefa90d8f8dc0020b364c1ee74ed02544965ff00df48d7ad6dc