Malicious PDF — malware analysis report

Static analysis result for SHA-256 cefcab75e4140bc0…

MALICIOUS

PDF

63.9 KB Created: 2021-09-13 11:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c05dd6bfd247d8a8024b0c9c600311f8 SHA-1: 09bd9dca1df78899cbeb14987dc73219125cafb9 SHA-256: cefcab75e4140bc0a1e08a06994f00c36b97653780487965eae32ad3691e44eb
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised CMS upload directories, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. The presence of multiple links on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

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://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd4437b8ea---45572405256.pdf In PDF document text
    • https://tectrongim.com/uploads/file/42623317313.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/20037775372.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/mitokobasexibunedidoritod.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/37114726220.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/94471708061.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021091212230788.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///lajokutututuwedumev.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/42165111255.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/tefomipomokizobijata.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/39820418789.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/18896648587.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/77891937523.pdfIn PDF document text
    • https://estoniapools.com/contents/files/85368852048.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613435f6d7b1a---55310288494.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/pogudurif.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dipanukon.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/rorelavanuzovonaxu.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/vajulag.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16136dabe2d259---3608595963.pdfIn PDF document text
    • https://jck.ro/userfiles/file/43198839780.pdfIn PDF document text
    • http://abwrva.com/uploads/files/1526551547.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/malononifejiwuwam.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/99552038156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bios+god+of+war+2+damonps2PDF link annotation

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