Malicious PDF — malware analysis report

Static analysis result for SHA-256 1383916a6d5f257f…

MALICIOUS

PDF

85.9 KB Created: 2021-10-16 17:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a44bcfa0761232136ccc960bb6a76b40 SHA-1: a4022d4eaf2b0627d1585cf10356fff8d9941f6c SHA-256: 1383916a6d5f257f6db84205d97893c9c4d3356877884cbb8a6c5b682e9dcc93
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5846

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://inwebjor.ru/uplcv?utm_term=isaiah+chapter+27+commentary PDF link annotation
    • https://anhhuynoithat.com/asset/files/kalazojesawojomomag.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/bebegatukixoz.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614f0e4000107---kikojejiwa.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/51890965134.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/98564178041.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/wipulurixom.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/34022229208.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/61966116233.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16151335cae7ef---jopeje.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/83816014531.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16159fe4bbb1a2---73738123390.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/bopurasuvipujikaxoze.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/bukuximigegomojuko.pdfIn PDF document text
    • http://derivat.sk/files/73855122876.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/zibovigifukodomamoto.pdfIn PDF document text
    • https://olterus.com/contents/files/kenibivurelawu.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/xepexakogawufewitumuforo.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/12751333794.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/xakonulinosobojo.pdfIn PDF document text
    • http://spbi.cz/res/file/55557023950.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/574f07621c249e2461c70b524ee751dc/30493265171.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/7186555310.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e74359578b---30354070470.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d34d1a3a1---wukoj.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/fuwusosavusevalaf.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/27147779947.pdfIn PDF document text

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