Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f69d9edd89f4219…

MALICIOUS

PDF

169.3 KB Created: 2021-08-05 03:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d3c85f3bbffbafa107e9755641235da6 SHA-1: 8f5e97a7229a515f9c298fc7ac20d7806151703f SHA-256: 9f69d9edd89f42192c63e6ddb63e23ce4e080aae7cd5117c0e0ac965ee5f1a8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious or phishing pages. The presence of these numerous external links strongly indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://synerhu.ru/uplcv?utm_term=clarke+cochrane+christmas+classic+2019+live+stream PDF link annotation
    • http://ipceurope.com/assets/file/7574782516.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/4370dab89b3602eb080d86966b986348/bofolikuwevasero.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608532636170d---15743482137.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/26499197380.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c8b01a21f---fabapabu.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/mepedoxebave.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/surinevagasenaxabovunawu.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/66186015290.pdfIn PDF document text
    • http://jainfarms.com/uploads/sowutiduxibidefijarama.pdfIn PDF document text
    • http://epoetryworld.com/clients/53741/File/junerejumemigomifinebo.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/pozamiwoxenex.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/43f70lk6efkc2kkjrsgkpljcec/47978341369.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860129b5ae5---36797095932.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/178d708c1e2468e2eb4497a3d4a87b6f/74121004400.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0f998c678---zefajijipedidukep.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d441326c84---tovaxuxibediniriwugudi.pdfIn PDF document text
    • https://cavalier-king-charles-spaniel.ch/userfiles/file/69711741657.pdfIn PDF document text
    • http://ahchala.com/img/file/17015348068.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/r6f4hadr60eblmkg0j5tibacie/jurasewe.pdfIn PDF document text
    • http://dzbnf.com/upload/file///73092777318.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/lapejisuferun.pdfIn PDF document text
    • http://heureka-cz.eu/files/wadijo.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/kofusi.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_off000232d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x232D3 11144 bytes
SHA-256: ff6324cbe47f25b71d89f27907047fe1d3d2b4dcd0a49649bc5fa9b61e8bf535
font_01_sfnt_off00024ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24CCD 18784 bytes
SHA-256: 5f54d734bf8d02544690ce8db259ece3c883a47c19ca93e25d75f1ec8b2e63b7
font_02_sfnt_off00027e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27E54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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