Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9b969a74b0e708…

MALICIOUS

PDF

109.9 KB Created: 2021-09-03 13:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d49fb96052d5d0440f07ed82b5d281e9 SHA-1: d1f03005bf4ca6d41e9aea20bdd548dfa6e76fb7 SHA-256: 6e9b969a74b0e7082d49cadee62dd44cef5195e622eb9dfd01517d04864899a2
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and unreadable, indicating an effort to conceal its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://m-isc.com/userfiles/file/puwudekasukepemesu.pdf In PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48149e623d---37989146516.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/90fbfb146f249f0239ae1faccdf42281/liduvuzafekakuregawiwanu.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2a75614d6494f14df71a0cc255ae0a72/72357591180.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ooq4nhniamtfh9ssik7r41llhe/tebefipikelil.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/ecc5abb24f8aca0245b664f23ac7351f/12044519459.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/gosibepowanareziso.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/16522613325.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/45276145829.pdfIn PDF document text
    • http://geoman.cz/data/file/76174952580.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6d20c50ae028ce96835f914211711633/22868091083.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/diwefovu.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/60595730864.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/45241130423.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dfb4e74d8c1---zegegoz.pdfIn PDF document text
    • http://medrea.ru/upload/files/89010955858.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/77811157232.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/55284469310.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/11686126035.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/sovitizexeniwoseza.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/lfq4ear53re0svp5jibucnq14l/94506287366.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/39583528304.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/zibagel.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/jaxozodob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=introduccion+a+la+economia+dobb+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_off00014691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14691 10804 bytes
SHA-256: b2881978844c3546149ee31dd87f52288f6491453cef25a5f46dff18714c2df1
font_01_sfnt_off00015f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F2C 19912 bytes
SHA-256: 6cb736bb40645023ed739a6eba7a911e89888e95e61d59c3fd5bb1c1eeab4748
font_02_sfnt_off0001919f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1919F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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