Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fec8956b77ffbd0…

MALICIOUS

PDF

89.4 KB Created: 2021-07-26 07:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 217ac068501f3e4121e88a1cfafcfa6f SHA-1: 77afd4754fe7e80c76ff6b4166ceff3b01c81c36 SHA-256: 2fec8956b77ffbd0ca3bb47973a99693b4c18a872297162486acd22a70df7ba5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other hosting locations. These links likely lead to further malicious content or phishing attempts, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/c5b96d43ce94c03e34ec1bbcd1966374/kigomuxewisalibevem.pdf In PDF document text
    • http://prosquash.by/data/33102472065.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/765horeeaeskr8pr7vhk0ur7c3/kawoninowijokodabewimulof.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/famusikad.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e59f424a01---xidefotaluset.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16092fe8fb93fc---92928652792.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/4182812211.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/44317684813.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/50517607412.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093e772cd4af---navurusufiz.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/wijigisipekixodek.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f75f877a6c---jidisajax.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/feruratosavepisanofedure.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/517e6729e1dc9c62610f72c64137e1b1/6593879375.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c25727fe5---ralebibep.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/favevotizesisi.pdfIn PDF document text
    • https://gilbertems.com/videos/file/12161632899.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/6051449853.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210721060733.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac34823908e---lavibugefazu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e2583b4d---91689125948.pdfIn PDF document text
    • https://ccskin.com/geektic/files/ziboxototupetogagowobidi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=surah+yaseen+in+pdf+downloadPDF 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_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 16500 bytes
SHA-256: dae20c8a83014560549260ac8f29ae6c5c327805702a1a9549a5317854c97ebc
font_01_sfnt_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001111b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111B 10872 bytes
SHA-256: 03a353bc369d79a418a98fd010ee060b5772f9704b7a10ee49e84641e80a4c8b
font_03_sfnt_off00012a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2C 18084 bytes
SHA-256: 86743f1a324d0989924904092ff64be5dda0bf7a921b594afa50a712cc56bc64

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