Malicious PDF — malware analysis report

Static analysis result for SHA-256 5637d95d5382e6e6…

MALICIOUS

PDF

62.3 KB Created: 2021-09-03 16:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7e0d2d1908518723e7f7e9754cc63198 SHA-1: d6af29e209d494121569f575a8947447d062cfea SHA-256: 5637d95d5382e6e647f7a7a5378df41fed3e17bcc5b084b89e13a6b29a6e0bc5
154 Risk Score

Malware Insights

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

This PDF file has been identified as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to numerous compromised websites that host further malicious PDF files. The presence of multiple links to compromised CMS upload storage and disposable hosting indicates a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746c77af841---42445041769.pdf In PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ed06e7c8be24faa7cdc6517287443b39/44786824349.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/621d478aa45afc543e2a62f09d60b4b2/75728385940.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/pizowigufew.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/vefuvosibogino.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16077806a86d7b---malobojepipevixilip.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/25087956183.pdfIn PDF document text
    • http://akssert.com/userfiles/files/jebowojujekeze.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/zawiga.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/dubewizenobo.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/13537935580.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/64223350812.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/xepijivi.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c0e25c9a6---volalifu.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c7e7b58f6---woses.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/57267f0bb12056b5949f5111b9612550/futusevatasepalufiwopiw.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7c59f5a811---39018359052.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/gl5u74ieokib8a0u01ch381236/70041540309.pdfIn PDF document text
    • https://swiz.eu/files/editor/lejaxudotunorujefegatigog.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161270f0caa101---83448728540.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790f04ceed7---nadubuvefetet.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/zidewuwizajixesapofibof.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/mibizepufemil.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/380978544.pdfIn PDF document text
    • http://korytnica.net/data/files/tadige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=someone+to+watch+over+me+judith+mcnaught+free+pdf+downloadPDF link annotation

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