Malicious PDF — malware analysis report

Static analysis result for SHA-256 441a9bd7e5e66a31…

MALICIOUS

PDF

65.1 KB Created: 2021-07-20 01:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be7da3a73b0d72548a210ad5a122bead SHA-1: 2822cdbbe8f19141e0f2b9147375a18f458d9005 SHA-256: 441a9bd7e5e66a31ed680bae7c49fde795f4b5cbcd43c5db68523f8a94c3a18d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further support its classification as malicious, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5460

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 http://studiofranzoni.eu/userfiles/files/34243869627.pdf In PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/lebox.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/wowimewuwu.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/l2ivf9rn5rpth8ppcdbqm5tf93/nudemiguzugemijeredokope.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/76473356517.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746a76ae0c0---pugoke.pdfIn PDF document text
    • http://www.houstonorientalrug.com/ckfinder/userfiles/files/5516921063.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e87df162f---tiwedejetevaz.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/bepulupotofuvow.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e58f29b24ac---pakev.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/wedibifizaniwufasuvonoziv.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/31805511181.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/nugaroneguroxol.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/1219274049.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d5fca526a9c---46928073776.pdfIn PDF document text
    • https://kermanrooz.com/img/files/55373573275.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/35092337932.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0e067f2b2---bunebesafujaz.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/20904266864.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/89644672546.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/lilagodabowufobofonujim.pdfIn PDF document text
    • http://szpk.hu/_user/file/68166506205.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccfce59edab---96363514212.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/s37m95m4gols9oqccah6uiek2c/sumejovikategenojonuzimal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=mobile+casino+real+moneyPDF link annotation

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