Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d278f37b6330fe…

MALICIOUS

PDF

66.9 KB Created: 2021-09-21 19:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8c8ce8f197de680e394612c01f9edf04 SHA-1: 0d92920879f8b0310b985dde12d2a28513226aa4 SHA-256: c2d278f37b6330fea341732d34a4a0931e56a9d09631bf5380dc11c35cfc3d4f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various websites, some of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6960

Heuristics 5

  • 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
  • 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://kozlovka.mebel18.com/uploads/files/29284245784.pdf In PDF document text
    • https://medius.sk/userfiles/file/90413792751.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/27904766953.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/16700504470.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/larijegiwisurilaku.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/zipigodixijojuramopoguja.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-1/20210901093015207908.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/70465037588.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/jekiwafibo.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16131588196ba8---lojoganibefub.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/45232205812.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/61118224997.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/vibuxukadu.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7b80e245f9924c19f565127c673965cb/37633541387.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4e7sufo574ejo05v67gh23gk3n/timox.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc9d2d714e---nizezazopo.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n2jedt243gnerobmsmuvlslj40/godiw.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/tojigo.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/pimunimobepijikesina.pdfIn PDF document text
    • https://comillaspostgrado.es/userfiles/file/wotufijowudizezepuvon.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/36003389198.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/65652196110.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/gagotuzap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=updating+kodi+on+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD382 17792 bytes
SHA-256: e3351b868f4e60d8b04746816cac3b830b84fb668c681b189fe72286e84252ef

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