Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ef9f80f52e8426…

MALICIOUS

PDF

87.4 KB Created: 2021-09-04 16:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b1a5deb62f8c3bdc56061887b736a555 SHA-1: 7eb9da18e1d6f12ebc494723b4e0a10c7ff54fc4 SHA-256: 37ef9f80f52e842636b7c5050f648e00fa35eade3d58ad0c3016586f8cafe62d
94 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 compromised CMS uploads and disposable hosting. These links are likely intended to lure users into clicking them, potentially leading to phishing pages or malware downloads. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7980

Heuristics 4

  • 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://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d474e4ec90ca5ad16cf5214d1062fa76/geforibizedukidowesigon.pdf In PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/65118277065.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a2c70cb4d---kepuzudemigutaro.pdfIn PDF document text
    • http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/4153020999.pdfIn PDF document text
    • http://qzgj.cn/upload/file/sarilod.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/89780588750.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/bivefeminawuvexovaze.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611f215cf371c---63553460933.pdfIn PDF document text
    • https://maisonforville.be/documents/file/lenozidakejise.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/8425c403296255b4b08cf5fb10bd4bc9/24439154585.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/15echapg8umjm73m1apqc2r6r1/pusexeruvevabil.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/53838518174.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/34441507187.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728ff9d66db---79748220029.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/sojuwojotabapefefum.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/63373807991.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=concepto+de+filosofia+segun+autores+pdfPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/zosezitiwapoxusamewarug.pdfIn PDF document text

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