Malicious PDF — malware analysis report

Static analysis result for SHA-256 225472ac613661fe…

MALICIOUS

PDF

143.6 KB Created: 2021-07-21 23:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 284e3f6c259a538de621ebd7e62df885 SHA-1: f84ec16c17cf5bcfb4bcc81be09a5820ece1af71 SHA-256: 225472ac613661febd84f657acd881d4edf5a197183b14a43b382604f5505eb0
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, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8811

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://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076057065796---95718491106.pdf In PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/19kks1dvv4vuidbhr45f4m8b4k/juburofoxafa.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/jawekasibud.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/3351052c2a318e42dcfac30ecee046a1/zinaxujewu.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/9572659208.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/hu0ot5hbs3pvo4b0u39q9b5k8d/deretowubenedelunovi.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/petevefir.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/kemuzekotezufe.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pfovasmc6on4f7t498fdq3oct5/52263543206.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/zudimugafexurimejed.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/pitodikol.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebebbc65cc---81019280192.pdfIn PDF document text
    • http://smn1970.com/clients/d/d4/d44d2684521ac238e4bdef02d06179b0/File/dediridovirenok.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/sipopokapoto.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/60448665393.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/2188221f3834a75548491b2c8377c7c9/xuvidelolare.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/48389866026.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d43b1d27---69410645789.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/e8a62036f182bd75c8dc06257a7aa644/40751158548.pdfIn PDF document text
    • http://24cvety.ru/upload/files/wojatolaxukef.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/fabifafifunivuk.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06e3ee0227---zupajofavokisosexirowi.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082441167646---kapozexitug.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f527d59b6---1138652343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=compensatory+medical+definitionPDF 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_off00021505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21505 10928 bytes
SHA-256: e519f3498a207739f1d31ab17bd474edd3923312aa560890c733728d16ed435f