Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bae93948973f495…

MALICIOUS

PDF

92.9 KB Created: 2021-07-16 23:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 338c69d6c37e72451ac1645f8a267c16 SHA-1: ab2bb8dc756df6f436041ce268f410e1da466001 SHA-256: 2bae93948973f4953458af9133e0cc5212ec943756157ef926ffe169ed8af155
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The PDF structure itself is also noted as a link farm on disposable hosting, further indicating a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 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 https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083202ae0e7e---wukuponiletepupuvabugav.pdf In PDF document text
    • http://thevisionkharj.com/userfiles/files/nusedefasuzalaso.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/22175419046.pdfIn PDF document text
    • http://cristalensi.com/public/File/56555331882.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/kunofu.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/386e9474ac1fef35cf6a968afe906839/26845098053.pdfIn PDF document text
    • https://museos.comarcadelasierradealbarracin.es/ckfinder/userfiles/files/39870226978.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/sunematerosuzo.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/11025904514.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/bq2v1msqfl1g6rbnuuc3fc3qao/82661408196.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/91942096592.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c67eace75---43712038089.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/29842611609.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/salilubuwerefa.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb9106f51c---46506439236.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607883068bd8f---wasedavo.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/20272367756.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/fee9f15d7fe9fd4c7f07935f2c310a17/zumiti.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ddab799162c---rezugozajuwafijofitez.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d62ca826cc---97591393524.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d870592cf3---vibozubuzuborenubedijus.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/69535154341.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/33d71c3dqape3q6nf1jldl45m2/zozajekugedilokezejaro.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/fokolomexewogujeranoj.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/kevibulivameranenowekenop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=splitting+hairs+meaningPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f62c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF62C 24928 bytes
SHA-256: 2c56567b98bf0a1f7bc5c2fb96ecc229de0e9bc55b3506de413940ed85707907
font_00_sfnt_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 10652 bytes
SHA-256: e62f736a531162cf175d08009fd11e9f6c95aed4dc20a4a676bb881f2cc662a4
font_02_sfnt_off000121a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000139b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B5 16932 bytes
SHA-256: a43d1a54ce5ef858098a8c9432896c5e85ce799955d62ad1845105d693c548b3