Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b029f5a2e04dc71…

MALICIOUS

PDF

91.4 KB Created: 2021-06-27 18:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6401d2398124b0313cd6eefb8fe3f84 SHA-1: cd447a756ef185f9bb540a25c606578400c33056 SHA-256: 7b029f5a2e04dc717ac971491bbb0ef50e7cab9a2032d7b984bb3982287d8a16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on disposable domains and utilizing compromised CMS upload functionalities, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74daf421c2---87387025065.pdf
    • https://menlopark.com/wysiwygfiles/file/kivefaruxelijilazosimum.pdf
    • http://hyundailed.com/upload/editor/file/busuwisur.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dcf2d75f5---fajujogudaroz.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce2fd8dcee7---ganavelumoripaturabifuzo.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a58fef15c---48539798273.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609eeb6eab707---39458056732.pdf
    • http://chiesamadremarsala.eu/userfiles/files/74745127934.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e6cc7ed52---noxowazivakiguwumunobido.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/356oop7jpie45om0el64apmpc3/71917845682.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/9340bf7c4f702841bea3bd691de1cde3/lakuninonu.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a2298458df4c87b7b83ec84c14cb687a/78547758413.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ae7a4a7ec---nojodefor.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d11f8d9d46---jabopomo.pdf
    • http://steakclubhn.com/campannas/file/lifabisatugob.pdf
    • http://shinex-auto.com/userfiles/file/53071921242.pdf
    • http://on-video.com/movies/movie_data/file/15464440101.pdf
    • http://www.hmcpacking.com/uploads/files/30536226248.pdf
    • https://producedepot.us/userfiles/files/giminonizevosix.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5813fce75a---33807229407.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee5b38d020---zubuwatadewenalugaj.pdf
    • http://praxis-greve-polley.de/web/editor/files/93031134792.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ff2831dd1---16249965141.pdf
    • https://systematix.pl/userfiles/file/18849610992.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/53c958969b9147b5f6276b112829a77e/wututaf.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608366ceb3b2b---16561952992.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6733c0349---84825759188.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=nfs+shift+2+download+full+version+pc
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef87.bin
7454f4728e381f85872ab619ef7bc9ff448cefd1fe2523417d3c6b110c6f6d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 11064 bytes
font_01_sfnt_off00010960.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10960 16792 bytes
font_02_sfnt_off00012172.bin
b9456efb7e65e5754ea0c1ceba39997642dc82397b0fdd27878356f0056e58b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12172 29568 bytes

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