Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfa7c12932210e2…

MALICIOUS

PDF

75.5 KB Created: 2021-07-18 10:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 625b0d93669b7517404026e0d1c42176 SHA-1: 872aa8a4ebcee42cf33027ff8ae932e30a110f87 SHA-256: 3bfa7c12932210e205a93924c6a69a2686d794dab213f7c43cc9128108c658dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting it is designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links for SEO manipulation or to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7403

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://mides.vn/images/ckeditor/files/62937733040.pdf In PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b19552b5a7---70073842423.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/tozozoludideroguwiwilen.pdfIn PDF document text
    • http://reinforcingourheritage.com/clients/0/08/0860c2a235168fe7e4a745c824023bdd/File/vexobebotumojaxavaw.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d44ae7036---20871830459.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b57d9ae0ccc---20234681484.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fea60ad5d---54775427590.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/letirulusakodawumuj.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/jojarafujami.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/zuwetaxokusarupoju.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/fac6259b93c94c1ea1f45f4c2d177454/koronadodokepuzit.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/9df90275d3fd04fe2fd2dbf2462d9f0d/28868939910.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/daxumex.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7bfd9ea9e---13541091507.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210625184639.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/fidabakajirudamefoli.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/e36ba53acf02d1d86e98d47a588a035f/nalozegodumobolokuduk.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/77441829295.pdfIn PDF document text
    • http://www.asslar.de/downloads/puwojot.pdfIn PDF document text
    • https://camelcarpet.org/d/files/gupinebukuraloke.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/96526342105.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/zidefogiroladaw.pdfIn PDF document text
    • http://exantusfamilyreunion.com/clients/9/96/968554593547eb574606130639276270/File/49421973097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ppt+cover+designPDF 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_off00010cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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