Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4c06de8f46130f…

MALICIOUS

PDF

80.1 KB Created: 2021-09-04 18:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e63d7b047811ea05221d96892d8d1fa7 SHA-1: e1cbaa3c8748d438c678c40dec58554a6fa1d4ef SHA-256: fd4c06de8f46130fa45af5d8ca726b427876ccadb4332e723ddbbdec9dccbb4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing campaigns that leverage link farms to distribute further payloads or lead users to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://crewmak.ru/uplcv?utm_term=2d+and+3d+shapes+worksheets+ks3 PDF link annotation
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/duzokabezoxanuneniko.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/27482797028.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/81615970317.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/lafipuloruzilegokadewosir.pdfIn PDF document text
    • http://berbun.com/user_img/file/punamujikuvanul.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f814d3b12a8---keruponarabemudoweba.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/k80emkbn95l0kjll6lkk821jq4/gamufixopanumisinigoruz.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/16086591402.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/pebubumek.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/30702858868.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/wuzasilerokukifem.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607018cc884c8---libupuvodulisiruxukoxejo.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bfc6ca562---23654337750.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/70474576133.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/puputimofux.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/6084454783.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210726_364D054699FCD86B.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/36996041608.pdfIn PDF document text
    • https://irrisyst.eu/files/file/dimonoziripovosoxulovoj.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/tilefabaw.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/24e3786ab23e0b31c26b724ef880d90e/dixapifakafibujaga.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/42455624517.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bab995872---79735733399.pdfIn PDF document text
    • http://proxima-design.cz/files/file/xiwixaligizufo.pdfIn PDF document text
    • http://dominant.name/userfiles/file/loxoriwuxebifubi.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_off0000d305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD305 17540 bytes
SHA-256: d465dd6a7903e772654f6bef0cc4a242edd2dc99b4be670bd9daaf0ca2965ca3
font_01_sfnt_off00010084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 10724 bytes
SHA-256: e0ace497eb5f8bbec26ff674da9ab8f1631b5db3fa3142e0141037d859724dde
font_02_sfnt_off00011945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11945 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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