Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0c398542b61e01…

MALICIOUS

PDF

83.7 KB Created: 2021-09-07 14:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 27026a0f21fa4186017f753e3b57574c SHA-1: fc94ecd1464b15137239c24285617d10343fcdc6 SHA-256: 0e0c398542b61e01497aadd4659354d7b5fcebd99f7fbd165580fce2125f8976
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs that point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or host malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://crysiq.ru/uplcv?utm_term=best+book+for+analytic+geometry+pdf PDF link annotation
    • http://asea-admin.com/_userfiles/file/20210703023309.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/zexenuvuwiwar.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e636288d9ba---73306920727.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/35154076244.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7718528081---vorusuwowad.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6750981c02---kokub.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/bajipojujiwuwevunatu.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/56349083911.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/famize.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2473853f24---21356797243.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729e4d6e3d2---92695661817.pdfIn PDF document text
    • https://digireg.pl/upload/barasabutelekifoboz.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/zezikemuz.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/f8458b12da99dc3ef8a1dd22c7e92ae8/8116551062.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/96612122157.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/suzopi.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/xapupogakopusan.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/newonadotedirivujataguful.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5311da83b---50012678567.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607d21d8d368b---tixupagulisuromup.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079967ae85f3---rigijejasojudoxad.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704fd82ebb5---37728521808.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c8611f4ed6e---2795514132.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_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 11360 bytes
SHA-256: b8575bf86b0851bdacb3d5b489d3e96e1045021b76b428276b44b153de265539
font_02_sfnt_off00010fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDE 18876 bytes
SHA-256: 8df9250407a42224f6bb43178d648f39311ccd8f808ff8eb796b76533d1ec997

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