Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cdcc4cddacc9d1…

MALICIOUS

PDF

88.4 KB Created: 2021-06-30 01:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dbabbf2a2dfe31d36dceaae4b3b14603 SHA-1: efd6459053819764b67468cadf77f8d91ebc3f8a SHA-256: 44cdcc4cddacc9d13e5f8126f64b10e24a902d59a931f6eb5aff51e5b03edbab
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs pointing to compromised CMS uploads and disposable hosting sites. The primary purpose appears to be redirecting users to external, potentially malicious content, aligning with phishing or credential harvesting tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://zlato-eu.sk/upload/files/50198192714.pdf In PDF document text
    • https://mangonebike.com/uploads/file/27892304156.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df437467ac---wuvejojipulajito.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/df3e53e9f30a0e5aafc9b6bd100283f5/lirevawobegudafe.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7af434d4e---73811483938.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3eaa55542f---jikipuj.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/8d7e25d3bef30d66209a9664295c3efb/jujozejadenibiwofoso.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/97128039479.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kemidelubadasuvim.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/8d2fd18bf8968291902e209a5e4441cc/tewumanowogekijeli.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/9aae99472ffd3bdc4b890dc2654acd88/54648662501.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/xikajixuvutubo.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ff37fce525d6715fbae53aeaa0cded2a/wozawukabujetowesavununox.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2f72e5edb---93699077103.pdfIn PDF document text
    • http://hzqzg.com/d/files/gagamuduragopobuv.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/8fe012abf0aea864a85f8d23b5926a8a/xamunufama.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/78001727074.pdfIn PDF document text
    • https://okna-kurska.ru/page_edit/_samples/userfiles/files/tesovufexej.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/5c099a8c7ca2c76e7d545e1673ca1bf9/26151460808.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/gnl9f3m2u78t97huj0p0tt45cf/35164208008.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/m9rkludlssi3an3n2tupdaj08n/nixipamupuvu.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/juxijotovekazif.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/91lls5c0ls5627pjtilillsebf/8100840716.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/84230211736.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/3em58atm90jfuj0n2ahnjvtet3/12279454337.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ea2f38aa6fbf5dfca41bbc7e45f53942/61375531429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=red+colour+blindness+is+calledPDF 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_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 16676 bytes
SHA-256: 6e004b25b18e8f0b8d02e9ef473e351922b9a98274666b2235d3d55ee15b4d93
font_01_sfnt_off00012434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 10548 bytes
SHA-256: 3b94fa4bb96c356713b3d2333a558b508300db017be759dd400f621b210c8cde
font_02_sfnt_off00013c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1