Malicious PDF — malware analysis report

Static analysis result for SHA-256 5144d362cdaa70db…

MALICIOUS

PDF

67.0 KB Created: 2021-09-06 08:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 49ac1da1c559edd570663439e2b1bec7 SHA-1: 9db8c759a88e01e5981a56e33c55bb6f020c2295 SHA-256: 5144d362cdaa70db84b3a0e72fd24d82599cda4d3f5e512cf6e61cb57345f7dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm, with multiple URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect the user to a malicious site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5526

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://togeltop.net/contents/files/zizabakel.pdf In PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079dd54c0c03---63309257182.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/xefidasetax.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/vakubazodofibiw.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/zixawevunezawika.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98e06605d---3695798957.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/12429303618.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/95144560182.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfinr4mnt0ktjfhpprp0fjt0ba/3706676196.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a66668c2378---55033212976.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/02223vkibr3tdtvq6nm5lfd2bk/93575617355.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/62696746998.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/79388358918.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f57bdddf11---51076030007.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/neduxenesaxusuwetapopusof.pdfIn PDF document text
    • http://geasit.it/userfiles/files/54036395576.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/90527144390.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/92429706139.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/88821957040.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae2f75e1f1---dabeludisovogajone.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/d7omi09h8jevp6fpl19dvro1db/6882452346.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210611141728_1784806878.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/zovisiwudalo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=electronique+pratique+pdf+telechargerPDF link annotation

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