Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5d00afc7549f1b…

MALICIOUS

PDF

77.2 KB Created: 2021-10-06 10:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 7afb4ab9bd74e30ffe7007fcc7e61c60 SHA-1: eaea18329e92b3b1f2c5d93230bca99585dbf788 SHA-256: 9d5d00afc7549f1b884fd378bd55ad9bd597e46a07439d9907349fed9be4a7fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • 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 https://wastran.ru/uplcv?utm_term=primary+and+secondary+transducer PDF link annotation
    • http://faizleathergloves.com/userfiles/files/66668976249.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/92116352644.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/pagomowusetosasedur.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16155dd86cdc32---43643905262.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/mabetasosujuzirupotagibi.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139f981681ac---nadidudigisuvonefiron.pdfIn PDF document text
    • http://livestocktool.com/d/files/kigororakonubopojawev.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/rusewoxutufewapirebubijep.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16140aa3a33aab---bizipakifidefobulakadaxe.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/17962735712.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/7813250047.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145f92fea510---37747958028.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/kajuzesuzetotamijig.pdfIn PDF document text
    • http://affectif.ro/data/Image/file/12671375515.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/powexunog.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eab6155054---6278870164.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/dezirizumezedovazenipemap.pdfIn PDF document text
    • https://dienmayngalinh.com/img/files/16718917541.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614f77138a002---13941654583.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/78488288374.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/37918953061.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/gimawepiwuk.pdfIn PDF document text
    • 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_off0000ca30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA30 17132 bytes
SHA-256: 6391ff6dec92a68c54010db4abdc4372ec3b5b9d8a37d0c8b6689ec0de9f6439
font_01_sfnt_off0000f676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8D 10700 bytes
SHA-256: 7bb42ed38252cf3fce87426fade96cb53878519ca30a65f191623422e907038e

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