Malicious PDF — malware analysis report

Static analysis result for SHA-256 587fa915d047e07f…

MALICIOUS

PDF

86.8 KB Created: 2021-07-09 18:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4a5c2873b219d92512621507772e1c0e SHA-1: 6f14b33f3f941986bc5148b1a9192490ec2a9a94 SHA-256: 587fa915d047e07fb8e21cce4fd327029ebdca523374fdce85120d5d82bc63cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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=90+day+bible+reading+plan+new+testament PDF link annotation
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607124febc94a---94934749795.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/7dccf0b971c155dabd5169914b974329/5163199626.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/43771329466.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/zexaritojoxoki.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/5a50a9fbaa252bb522ced862e19f8d36/suputijisaze.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/bavugazinumef.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/bibalagezixatadekev.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075941723b88---gofubilotov.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/a4f29db813886fbab803913a357ce3fd/7850875304.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/39939493933.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a787373480---zixitelizebodujapivinaf.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/rugiwijisi.pdfIn PDF document text
    • http://placc.info/up_image/92884787410.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/ludizojir.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/76315326769.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/dijexajebepuwadijupi.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/81872671991.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160759433021f4---jezidugosukejagoz.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7616be41d---73531773821.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/71076506717.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/63819690a76288945ed7085149e69fd4/bidaxosal.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/15481869937.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_off0000f1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 11148 bytes
SHA-256: 5b1445577897106c44b6f80e23577856194a9ee046760d2c687d4d437ea6cf93
font_01_sfnt_off00010b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001235a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235A 16448 bytes
SHA-256: 69b28b789899260cb80747637af98c311c1720e07b881fc9e22804daa29d57cc

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