Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb762e004e49498d…

MALICIOUS

PDF

100.3 KB Created: 2021-07-03 02:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 47bda9fea2e6e7ed322ca086c6ac876e SHA-1: 741bb30ba734b642edd2bf572c9a5fb07d3fec9b SHA-256: bb762e004e49498d7c8dfa17a6def90d39bffd433b3234cdcb4d6dffde3fccfc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier also flagged this PDF as malicious with high confidence. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 5

  • 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://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/fb487e924ceb489f3bc926ef9e61cb10/lojajobari.pdf In PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090cdebe01de---19449844793.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cg54b18e83929rg78bokjm6mj3/jufapululiv.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/dapevuga.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/fonivozoberilikunu.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/wofuridorajuwigoximarede.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/b7iadbm6iflqgprb5rmtcdose4/77290975486.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/tafagodanul.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/5843754028.pdfIn PDF document text
    • https://medius.sk/userfiles/file/kapinemasodaruxugem.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/f9jasb6im2nuf8jg2eplmjh80q/36525647499.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8cf583f83---fetifipagagogupejimeg.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080f2f350537---gorisumixe.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062118563474.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/81b7ea7032e9dd559060df7774c65518/xevewupewunutike.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/93333232027.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608695bddfd43---dimavug.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b12f57cbae2---67465575718.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a44fd5334---bogitojoros.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/japilozosi.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061504481391.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/813c30d19dac9aa38863766428982d37/paxoramakosidoxirazus.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e7960f5c7---zuluvojuroluz.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865ba7a79c6---zitafipebujowomupema.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/52854898625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=red+working+cocker+spaniel+puppiesPDF 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_off00012222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12222 18928 bytes
SHA-256: 4338a3fb96daafc15e694e012b88b015b67bcbc9c465a03115c47d3d5a7d1f45
font_01_sfnt_off000152b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B1 10916 bytes
SHA-256: e069942ed01fcf5160a6de66790ba11f67eb489b615598596e1d93edfeb2726b
font_02_sfnt_off00016bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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