Malicious PDF — malware analysis report

Static analysis result for SHA-256 647cae7ae1b7a147…

MALICIOUS

PDF

77.6 KB Created: 2021-07-31 07:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 943494fa873b7fea76a59a113cdbba77 SHA-1: b39e077d8a0befdcc028fc2b9bf3224a11ad3587 SHA-256: 647cae7ae1b7a1472db4bc8bc1935773f5c0caa8d65a1f76ce8c210fa03e4eec
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that redirect to external sites, some of which are hosted on compromised WordPress upload directories. The presence of these links suggests an attempt to lure users to malicious or compromised content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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://gagiongvitgiong.com/ckfinder/userfiles/files/60370947131.pdf In PDF document text
    • http://helder-effect.nl/userfiles/file/jopawesuribuxuxu.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/30173215034.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/62218010011.pdfIn PDF document text
    • http://crediramasrl.it/public/file/26912607577.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/nibalurizajonirofepovevej.pdfIn PDF document text
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/penefadutomarosoder.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/vigijafogaratodowopajajem.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1932999bf7---fedikomu.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7dc0425da---40868173786.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/79c8b48144ccc74f6bc5f75556982b12/lajaviloxavaditigaxupiri.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021051208175973499.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/ddc2ca883fa328b07db6b0872bc0ecb2/86725711356.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/lotexek.pdfIn PDF document text
    • https://pindimana.in/uploads/file/vufixelenugalokove.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160e667d66463c---dexutijeraziwaxob.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/cf540e35cdd2e77b23fad50adc5ebce0/36345201991.pdfIn PDF document text
    • http://tfforming.ru/d/files/18117956928.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/68036273788.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/womoniwixatofofutolokinop.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/68984342c587b4b9473c25410722262b/fowebafur.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/14a3604d7039318c7eeb6da3fc171405/nupizidepokiw.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80799da2b7---fokolase.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=conversion+m3+en+kgPDF link annotation

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