Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08d02e638753aa2…

MALICIOUS

PDF

53.3 KB Created: 2021-06-27 03:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 74f3a9aaa69ab47451c87cdd8f5c96d6 SHA-1: c8234e39ce0f6fe9fa59cafb6761293d25baf18a SHA-256: a08d02e638753aa221f3100e341087f49fd3bf3fcfea234a8ac407e8341d950c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8399

Heuristics 5

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=embedded+files+in+pdf PDF link annotation
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/421568e7432f9604f453f24fd7dbbbcc/vidoj.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bced6b9fe---gefilekakikilimesabe.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ad7a9cfc6---tivibuwizulifa.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/243dc39ccf58c8d825c67a85650a1cf4/tuxivinigowofuvani.pdfIn PDF document text
    • https://stopserv.ru/files/file/53811872721.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/68835490254.pdfIn PDF document text
    • http://kotolantopeni.cz/file/jazojizegekugelojufe.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d4d2419b36152bd72acb9b9b2c9cd332/92840778600.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b302d1e9d2a---pejijawejolanenesuguxir.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d65ba79ea2---duwopesowobol.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093afbd5b63a---mutetaxudedokiwizitedanop.pdfIn PDF document text
    • http://skupka23.ru/upload/m/38253424721.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/e859af4c62110bd0943c0601d3e761e3/10406766122.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160928271710c9---bolinapabexaf.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/50132559113.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6c03e340f---4225982825.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d07c0d7786b---97954197251.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/zavejemijexeboninotatoxe.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/f58283a71990d7c29bee470de2f60454/jejigajifasufagamige.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71f182d587---21473548300.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/4430667622.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/hts54ha2s7vc32r4gejqo6li93/vozeviragiwozalunezij.pdfIn PDF document text
    • http://didocrosby.com/imagenes/file/77386024644.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/45800120314.pdfIn PDF document text

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