Malicious PDF — malware analysis report

Static analysis result for SHA-256 336f70830a28be22…

MALICIOUS

PDF

69.2 KB Created: 2021-09-09 17:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 614f381f78ef0cb4f895fe56e4f3c2e3 SHA-1: b9093ac57cad8060dbf789ed3e9e57e1c20cf6e1 SHA-256: 336f70830a28be22255c080bf0f55f262754fe69be3d8b763daf5014c60c9b78
124 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to direct users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature. No scripts were extracted from this sample, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4660

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://thokhoavietnam.com/upload/files/17631055551.pdf In PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/23091029958.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/lerowu.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/nogakipe.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210906_B79E3A9B8DD2D139.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/ralegosabawudikajagefoka.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210906/file/16309529442516.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/vufabawafirofo.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341b730dec5---510076378.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/29907932987.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/makonesejajomebave.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/zonopewarugepisek.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210907_B0A5157F385D462B.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/tugojidufamuzid.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/lijekukopezonufe.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/43074211578.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135061a7cc17---60519102898.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0fa1adfe6---sawodomafut.pdfIn PDF document text
    • https://hotelharmika.com/assets/userfiles/files/63301582363.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/81058513117.pdfIn PDF document text
    • http://spostojow.pl/userfiles/file/valawikupunukifi.pdfIn PDF document text
    • http://renknh.com/ckupload/files/kalawewexaru.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109032036389353.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/53420989494.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/92831035253.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/7173812201.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+get+100+likes+on+instagram+freePDF link annotation

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