Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0d40fdc8ef7c3f…

MALICIOUS

PDF

82.2 KB Created: 2021-07-19 00:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 65b5f7e791bb96250f89f876aca89631 SHA-1: 1aff4724a49c24607c54c681ec777205971a0118 SHA-256: 6e0d40fdc8ef7c3fa191b37956da6f5f238d98368c3113c92ccdaa56e98984f7
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The presence of these links indicates an attempt to direct users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://vencedor.coop/images/admin/file/27691470137.pdf In PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/273073a423c0abbcb72ab7a0bab2c60b/30893320441.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160983431e372c---28997613799.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/4d613d1202d198915e015b7c0964297d/51465889114.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/53759965905.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/46420675871.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/11092750655.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/loxejodifefebojibivevukag.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094101c97584---29274292399.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/0fqnrd274qaej118c1praknp00/pobosixusa.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711b05439ba---kanuzagime.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/gugibarozerulalil.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082469673026---43301071410.pdfIn PDF document text
    • https://etimes.mn/uploads/files/92531840959.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/farixobina.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/zekolobowowusokupanixaxo.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16071e3be5d5dc---92281333443.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c79947fca5---pajemoledekitef.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/cf7544e3ec324d899202653467fa9d00/pamapopefonubutodedenegos.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/4740e0b4b8d425904f474e51a9d6baba/26712939315.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/5b9420b1a8f7a046eeca9d210996338b/deduzazatezofibategoniso.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6b17aca254953ca136a7c726877c35c7/24275022805.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/98242253314.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/8esi933df7rpeob1k7g3hgi5l0/66573526125.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=install+macos+mojave+from+usbPDF 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_off0000da7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 10792 bytes
SHA-256: c89d27fa65a3477f7177ca230fa06121f82680f52f7dd4ae30adc5ac6ed4da3b
font_02_sfnt_off00010b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 17548 bytes
SHA-256: 44bc0cfdc8c74597cf011820e96a5582316623c41e1bef47b975006bbd8a561f