Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9b1e32614cadc2…

MALICIOUS

PDF

72.7 KB Created: 2021-09-28 11:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 983af2d2ca207f4a6731257a72feaf26 SHA-1: d7a614c55e9a32d8d2085da86ef8e2f5f800f06e SHA-256: 7c9b1e32614cadc23deff9674df55f018a7908efb61a8d6b1d9fef276e5c557b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to distribute malware or facilitate phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://www.gpe-el.pro/ckfinder/userfiles/files/61528139266.pdf In PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/soroxogawapi.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/wesexuvevuvajajarolewe.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/gomakakudilo.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/sakiwitixilu.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/11618849741.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef80034cb6---63249175964.pdfIn PDF document text
    • http://quinta.cl/upload/files/52604058810.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146d2ce786df---nugujaxanunamu.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/67748197759.pdfIn PDF document text
    • http://jor-agric-aqua.com/user_img/files/gixupudozitonagabivibixod.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/23953349654.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/54406481322.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210925211713_e2gv0z.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/90147008480.pdfIn PDF document text
    • http://mutitar.com/user_img/files/fibokibakofokuzaki.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/zabodabugidadovumojosota.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/jeluf.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/57718086867.pdfIn PDF document text
    • http://marine-inox.com/i/File/63694147901.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d891fa059e---gikulemuz.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/90728415030.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/sekufulotijupopusewetaz.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/gixoragorelusumubed.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16144d7a6bfe7f---zewolunigad.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394e0128466---10226077226.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/63123226663.pdfIn PDF document text
    • http://aerotherminsulation.com/userfiles/file/80602076101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=enlight+pixaloop+mod+apk+downloadPDF link annotation
    • 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_off0000b947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB947 10700 bytes
SHA-256: dd8d0ee3e82e264d0803500c1249d2f904a37940cb33a40d6d7fb977cd703db7
font_01_sfnt_off0000d15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15F 16936 bytes
SHA-256: ada7b781aca10d547dc4583c48ddc10ad2ba88714517bab6dcb2417205698f0d
font_02_sfnt_off0000fc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.