Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd06db7dc11b44d6…

MALICIOUS

PDF

82.3 KB Created: 2021-09-04 21:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9c8f59b6e1a620bc69c319f33e71cc9b SHA-1: 9aaafe7294a91b03336b36e75c5d5d5f42f7afa6 SHA-256: cd06db7dc11b44d6df7919b7ef4c58e79e40f08ac33ca4d82bb1afb9b369c33f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ckd-otto.com/contents//files/rojukematozatikizox.pdf In PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/06e91df1057bf17025151d1fb4b26736/gasesiporexo.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/66092239817.pdfIn PDF document text
    • http://halmar.info/userfiles/file/kupipizijufevuxuf.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/zowuzi.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/m8741t5g3kgh2dmiolnlh17dg2/17305620465.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/47385511375.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/f3j62sstoba9nk477k1ls1qa8d/nogalifodijexiguzuf.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094c8c870f3f---58437718291.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/savexogarufebopo.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/sunomibokugefizifofu.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/c41a6b8163eb6fe8cc357883d4c9e52b/98438968985.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161236bed3c4a6---lomenotebazaxige.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076f11f16104---33182646416.pdfIn PDF document text
    • http://bowenworktimmins.com/clients/e/ed/ed750a77e36579213b976c45729ba45c/File/23488579614.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210823185105.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/nadivobutu.pdfPDF link annotation
    • http://sladkiy-ostrov.ru/userfiles/files/25909723407.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac7a8b1e3f---dogumop.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/836107f83ac8c727cd2172e3ccacecbd/kewex.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c25de35d7ba---13934413974.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/pagofozivusikik.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/295efb5f01a31c64c946695fa6777ee7/reruz.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/ruqgavselbvee9fmm7trmt97o5/lonalojezexufakakevo.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/sonakiniwanojatuvagerif.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/f64fdb78cd29a742d1fa46445d009c6a/diziwikizuwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=partial+differential+equations+methods+applications+and+theories+pdfPDF 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_off0000dbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 17376 bytes
SHA-256: 015a8f391a14f72b9791083b18d3cfcc0e8590e6ae4bcea93fcf110a1bba0702
font_01_sfnt_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 11132 bytes
SHA-256: f4c0caa5ee4d0f9805713dc38eb010e56215fdddff7b5ca3b31edff51a1866bd
font_02_sfnt_off000122f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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