Malicious PDF — malware analysis report

Static analysis result for SHA-256 37aa22390cad3480…

MALICIOUS

PDF

96.4 KB Created: 2021-09-14 08:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: aa4842d2769193c3cfc87ac4a36145b7 SHA-1: 2e5da5ac2e1e22c7ba616e36b6042a201176402f SHA-256: 37aa22390cad34805a340c62edd462099747952ac5316a8e241012047d1c864c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The presence of these links and the overall structure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://cabanagarden.hu/editor_up/mevukomezijagadegarisepe.pdf In PDF document text
    • http://lltsg.com/uploadfile/file///2021090909230596.pdfIn PDF document text
    • http://ubest.ru/images/file/zudumelofilijapixakuka.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/35100873014.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae99db06b4---tobudepimenovikej.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/18846494267.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/68787709857.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/samanog.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec49c83bd5---17811394642.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/082309344642.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db19c096e4---26446114630.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/kijuzegetalofifagofijopaw.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/xunusuvoveditanubus.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/wijewegivifagezedome.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fedef2cbb8---89747972047.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/80673257602.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/marabozokiwijuvoju.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/93586308125.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/pajisokalo.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/hvakmtu1ahg0hgmvalht12koa3/lelir.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/vivojekijimujakujar.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7a94cdda0---29210029546.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/68055959823.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/11806251507.pdfIn PDF document text
    • https://millvalley.com/wysiwygfiles/file/98655674813.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/numeleputubetudekubul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=instagram+followers+free+without+loginPDF 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_off000112d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEB 18416 bytes
SHA-256: a3883b0ef447baf1abb944d785cabb542ce616132bcf320ba7a0c948a5effcd3
font_02_sfnt_off00015ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ACE 10800 bytes
SHA-256: 41ef4adc8f61e8f07d52c69e9f5503e15eff8be92d7b08a6af29517548955b2e

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