Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3cc92ef87c0d4bf…

MALICIOUS

PDF

84.6 KB Created: 2021-08-08 16:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 60d3e63dda08f5d516a97a87ea8d36a3 SHA-1: f962d00713679b4c904e9b4bbc59f53c290b8cd2 SHA-256: e3cc92ef87c0d4bfef293123f1a40386410ba611890a1a4f6b7a2e94781a6a44
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with several pointing to compromised CMS uploads and disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the presence of external links suggests the PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6146

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://climacom.eu/userfiles/files/retigi.pdf In PDF document text
    • http://myphamlulanjina.com/upload/files/64621138660.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd279542100---majijewamojazipawuvodiwo.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/mokutope.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d772567cb97---45396778176.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ujmnbf2e3hlf8hat4ujfs7uhq0/domozewu.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/25433450439.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021070400452273499.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c5964da527f---89510821039.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c6366c047---tetebabe.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dad95f479ce---feradevoloses.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a04fe84c277---91361827312.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/24615287656.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/99379772510.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/godugubugevajiduwogofo.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/vajunewemomake.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/piroduwazebikavozupugas.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/48099919184.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac7e3d821a---wenadebeg.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/sobokasof.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/jinodigubedarimixotejowen.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/b839dd7f6472c1a6b0f7c4e87a295784/dijeromobiwuxopog.pdfIn PDF document text
    • http://benefielddarrenfordhicksunited.com/clients/2/21/2186b72972973349411f8b90e6071e14/File/jimobul.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/12718660459.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fb57de1b2---kisatanekajiwifugubapabe.pdfIn PDF document text
    • https://termoformat.md/img/files/gewogawegati.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/rulekufamafoxotumowuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=toefl+ibt+sample+questions+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_off000114ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CE 10908 bytes
SHA-256: 679b423c8525de73529fcb691f6c09de419b8614358c7eafb0c52fd8972e6e53

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