Malicious PDF — malware analysis report

Static analysis result for SHA-256 e750951e88472c90…

MALICIOUS

PDF

103.8 KB Created: 2021-09-16 14:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8918f9ad586e7cf96de197fb46f8fb3a SHA-1: 9bcc06a37f2a90b1b8a53a9c233bc4e4c95e8d58 SHA-256: e750951e88472c90fbab61ade5a256fd072495d7f49e2d6554e38cd1005668ac
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6703

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=dr+who+2005 PDF link annotation
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614122e491232---93013958322.pdfIn PDF document text
    • https://costarica4d.com/contents/files/47475186590.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/18187159324.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-09/210909235416209999wxm0tgabsewu.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/pitopisenoxivafiturizis.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/35742700724.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/66836391847.pdfIn PDF document text
    • https://csn-alliance.com/data/files/nipiwosenutodu.pdfIn PDF document text
    • http://jinyezi.cn/upload/83292944480.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/21659810749.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/69908272359.pdfIn PDF document text
    • https://km2804.com/ckupload/files/nijawijizefusitukewo.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/5669454107.pdfIn PDF document text
    • https://preciseenergygroup.com/media/sivaseviniwekatizowuj.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/jazolakukizovixoz.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202108311929423559.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/daxatozirebup.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c39a3ffa6---68707136282.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/85379171628.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161344f108acad---20138234405.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/voxenifekijipukomutada.pdfIn PDF document text

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