Malicious PDF — malware analysis report

Static analysis result for SHA-256 7452c89be15cdbce…

MALICIOUS

PDF

88.9 KB Created: 2021-08-11 16:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b5bee689343d7ff49618169dece88eb3 SHA-1: 6618daf872f60470e6a0815e861c08975bf09d40 SHA-256: 7452c89be15cdbceba66a5e6947290d8e4a340206cf5598167aeb00676378af0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to multiple compromised websites, suggesting an attempt to lure users to malicious or phishing content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm heuristic strongly suggest a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/14d3f90b4b2dc49c8fd43c6303f219fb/govetu.pdf In PDF document text
    • http://zonazero.es/userfiles/file/xukore.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/fekutiwilik.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202107041515159198.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/511d32433fc8cd4f82795b329a228f39/goxawoketinukuxikunimi.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160796c3545ce7---84969096935.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f9919fe95f6977e018917c49ef809ef1/96896480597.pdfIn PDF document text
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/84316373645.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c212c49289a---pubukagodu.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/fabokili.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/fkchmpo5kr9g3lri15lqa9j8tl/64291696699.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/267586b558f660c8c57f7b5a394b3cb4/nadesisojasuxunawiw.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/90260710071.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608dff781a153---76954815880.pdfIn PDF document text
    • https://proia.bg/userfiles/file/nusolaz.pdfIn PDF document text
    • https://noddy.nu/images/file/31231117412.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/dawotubuluxoz.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/39919128643.pdfIn PDF document text
    • http://apex-architect.ru/images/file/dizukosixukorabipar.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210629172633581.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/58214055614.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/e896a3d4f4288d64d293b2dfd02d57ad/fafijezesulitenexof.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160730f26c0e0f---subulixuxixivepekiwuxidis.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/luzawe.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081251ca16a2---dunamanewuxed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=e+to+i+stem+changing+verbs+preteritePDF 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://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_off0000f5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E9 18724 bytes
SHA-256: b32ff218f31c82451d4c1ff284cbd99a0f9351c1b4b1d36b11d594ad8b4b263a
font_01_sfnt_off000125bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BC 10964 bytes
SHA-256: 37cee8190d5c66b3530d6e7ee95740d2eef5119598fc4aea9584e2839f24d1a2
font_02_sfnt_off00013ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1