Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfad5e0035d76a5b…

MALICIOUS

PDF

99.0 KB Created: 2021-06-30 21:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a43855eedc1a31d42bda44cde9251a62 SHA-1: 8997e9b2be554af3be4676b15c2a7446d916dab4 SHA-256: bfad5e0035d76a5b4b56d6283773968072c151207fd66a7bcb3612dcceb113ea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085536316b2c---tutizalorizuwuri.pdf In PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/vaxitobowome.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/favivuzisuf.pdfIn PDF document text
    • http://riph.pl/userfiles/file/nejoji.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/67387694179.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c009ae7092b---63759212942.pdfIn PDF document text
    • http://momsystem.ru/public/file/sedobekoj.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/29a34f2d043ef4d33dd3011a70ec510d/xarufasekosusedogiguguviv.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/sii8q5h0i7psvng3piug6g0ee2/84702837641.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d4e9bfcd3---tijimo.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/zekemowovixu.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/fdc1d4bd0b2ce21d5ef0d1da8238996c/lajut.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdefe267c0---18357651679.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160706dca280b9---vunopevipubij.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-20/20210620045429266518.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c29a78db87a---83000688427.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/28904901299.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a546754804c---vofumedo.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/79001303373.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/zusir.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2092c4b9db935997df2f192ba436b87f/54298559497.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/f9257feb83a128334dfbedf89e8ce421/18840951599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=light+of+hope+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
font_00_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000123f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F2 10448 bytes
SHA-256: d3bcbc50628167107afedfb7990a8a0afdbe520760e8b70920de5a71139c94c4
font_02_sfnt_off00013b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B73 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_03_sfnt_off0001514f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1514F 17208 bytes
SHA-256: ec69862f4e471a483f825353b0c2f034ed4df9edf2a338dc56779bc53b8922e8

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