Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f23563f4f5611c…

MALICIOUS

PDF

53.9 KB Created: 2021-07-08 04:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 69c7d483fd2116387ce377c1d5bb2e5c SHA-1: c813c562b8384cbdbf86dcd83d043537be582282 SHA-256: 33f23563f4f5611c1a22a28b0c09dba4a130f8b5f4e8ce7552d205a5d7125a71
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains. The ClamAV detection and the nature of the URLs suggest a phishing or malware distribution campaign. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4912

Heuristics 5

  • 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
  • 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://infrive.ru/uplcv?utm_term=chess+the+easy+way+pdf PDF link annotation
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/a0e087acc3b71a2ea9e4e8df14835215/81007974634.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/kuxasiz.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16081ea2c5772e---92253422920.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/83722873112.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4cdfbe1ab---melifemazuxalipow.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/e439gl2j4hf8cuf3gej06bucr5/58281609505.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072417fd37fc---kikiluvejipugemevovegu.pdfIn PDF document text
    • http://ponyomaru.com/files/files/46595135660.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/mifadivekagafod.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc82e85c64---98494696728.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/523a8dcfb2713b8bc314ae815d7958a3/xoluxigulilo.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/qv2u5kkvpue53ddpi3u09n3fbo/womafijewukoj.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/91d4om3fgmal3teha7tf5rhcsj/68763306917.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/41b526ffb2f1d021685763e85f8659ea/13221056005.pdfIn PDF document text
    • http://splogservice.ru/content/file/mirorivasozaxisaxadune.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/madoxokegoguzabadavufilu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4ffdb42c4a516236ebab552c8cf0b32a/79510662080.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609b55c414320---65376993030.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210627035351.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///bakitexowenemibo.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/37039d6729f96a6d178393908cf6e79b/56872481234.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/pubazexovipelajoni.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d61263663---jixawunofoxabip.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091e1165d738---787349801.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/21962068163.pdfIn PDF document text

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