Malicious PDF — malware analysis report

Static analysis result for SHA-256 67206256a2c82567…

MALICIOUS

PDF

88.6 KB Created: 2021-06-09 17:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e0f9b8ac66d240eae38838da5d13c8fd SHA-1: 934ea3b3ffd36b9363eb4001a9649a0faf1cd3de SHA-256: 67206256a2c82567c67b30ff1cdd23843b700626490e65ab7fbf1b30033a2e66
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be link farms designed for SEO manipulation. The embedded content and heuristic firings strongly suggest a phishing attempt to trick users into downloading cracked software, which often serves as a vector for malware. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

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://queure.ru/uplcv?utm_term=catia+v5+r19+crack+free+download PDF link annotation
    • https://alnahamgroup.com/userfiles/file/mipizogurekeriwa.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/44328696634.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/qldrfh449t0pvf67m7e481n7f8/kedakopexizem.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/luwugekisegi.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/52f051985101c31c3f3aa5cda35b9a28/42035337060.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/55a0bc1567a3d3da1f37fbb91d9eafa8/wabonenip.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077df001e522---lopexev.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be57455f22d---49841729153.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/d7c4fa323bf72f38741d65c1edea349d/wibor.pdfIn PDF document text
    • https://securitydm.com/slicice/file/bigosomip.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file/%5C/2021051009474249.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a3eca2550---19273454174.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/af3db30e6eb725233a90e68ce9a8da18/12440902304.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad158c12b26---22776750258.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/a76fsois17h83pkharibpvushg/9735479519.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb01fe45a1---xiweluwulume.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_off00011634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11634 5288 bytes
SHA-256: e86812cadd4c02c5a9d9cdc0f88f27ebc8c8757a50b1960a8ee3d6cb05182cf8
font_01_sfnt_off00012867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12867 13788 bytes
SHA-256: adbec1d5b8308bc213d8ce8f88e7ee442e3b4f52080d162d7e83916ad90c01b3