Malicious PDF — malware analysis report

Static analysis result for SHA-256 814d35a4cdda61a5…

MALICIOUS

PDF

71.4 KB Created: 2021-09-05 23:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 89b513be139fdf748480e6c368299337 SHA-1: 42fad8a6eb4e85f4904ac9064876e6847834303f SHA-256: 814d35a4cdda61a5a14509f2af2011c664c15d20544f0ad97ffc4fec0f4ffb05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The embedded URLs are likely part of a campaign to redirect users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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 http://flexa.cz/docs/file/93901858626.pdf In PDF document text
    • https://limblength-sldf.com/userfiles/file/bezifesikikidosiz.pdfIn PDF document text
    • https://isleo.com/i_photos/file/69211197716.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/41729408657.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132907558057---sudufujusosupomedexoduso.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/11560905988.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1611e3444b3c01---vilolakivuberagubotewa.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/36942372742.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/eb3db4ab5ee30196f992acc5c125c71f/81805890613.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/35361994081.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/duxupoguv.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/68214453438.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/mimuvatez.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/68062010945.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/a6e4cecee65c2180a562b82845061a20/74799454581.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/wodufa.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/4e244a8882051a4edc794569150fe2a8/navedodexazilibewutu.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085acfba77d2---tadokivuvizexupes.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89d06396a---45613155857.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/42b4d58203a61df4d4dcce9d4a438428/kixitiredibenaz.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/014b7844a84bbab09c81cc9cde9eb653/77070632535.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1836ed50d7---12586717471.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/gakawodul.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/t1r7ctpjue26iigei9tlcfaadt/72932984408.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=sujet+de+philosophie+sur+la+conscience+pdfPDF 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_off0000e58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58D 19484 bytes
SHA-256: c1d14a84818014dd2dc54286bf55eeff282e203698c445a9fd087fb7c7219324

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