Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb346278b881f49…

MALICIOUS

PDF

77.6 KB Created: 2021-06-30 00:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ffd5a626f21fa6d4d842f4213dd6d33 SHA-1: 77cc5c3c6728dfc1cace98e73145a3daf967266b SHA-256: 2bb346278b881f495a5cfd964b9046f1fff63218825debe2814b13ded8b1a19b
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV and an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The PDF's structure indicates it functions as a link farm, directing users to potentially harmful content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082abfd743fd---juwefujajozipaxixidogiker.pdf In PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089588a803cb---nakazirigitogesubenimibe.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/958c85d432ab899aa72ac5d270ea67af/renopavofetuxer.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/1642262863.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086639711279---zeveg.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/fkq613lq406dav78u2h4usoqbo/rewavebomagapegire.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/kogitewu.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c961a0f3988---rumababuribu.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607836c0497e7---tadafelimujututexaju.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160999b6890b7c---73594888496.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/48939946785.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097a382a9870---zabupufalizulogukezodujun.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/65577357798.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cd1b1c2eaf0---62571311112.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607034c125bd5---42209850205.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/91173586889.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/72a6888a029cc2acc5e7fda4c5bfb57f/xepituwuputejakixeno.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/87516231187.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757a0b796f5---81918953973.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/834299bcbd899ccad989d78cac0a1a32/89020259526.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b7bacbf7d---jerijazakokenex.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609403a8e7ba5---xovofotifamis.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e54d1d888a---8020848897.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/3560e811d8d60099dc2fae477adffb6e/91050682010.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/gulidegikuvejamo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+city+of+ember+book+pdfPDF 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_off0000cc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC15 10712 bytes
SHA-256: 3ff8eeb1817908b01e3a0cd5c56de37e9e3ef078229de9b21abbbb0cea7de55a
font_01_sfnt_off0000e477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE477 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 17136 bytes
SHA-256: 045a7f5e634df4477a48511394202647c6b4ca0ffd4dcfdad84d3e5d947ad5ab