Malicious PDF — malware analysis report

Static analysis result for SHA-256 933dc1e9cc0209b9…

MALICIOUS

PDF

56.7 KB Created: 2021-07-05 21:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: ffc217f8a638a9589f3ac70a32318d01 SHA-1: ea453307ff5eafb2be08970bb5b4c68532666ed4 SHA-256: 933dc1e9cc0209b94cc5cdb242dd843a1ae7fe09101ba1dc3060b376ad5eb5e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5759

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://bradleyhillsapartments.com/demo/uploads/contents/file/23957170593.pdf In PDF document text
    • http://robedecreateur.com/img/files/togilozak.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b971a9d5444---jelanu.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/bamowozezeduwebu.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210517/210517054240710030k3dxgu18j56n.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/10c605a67f096a03dafbabfb61d95561/93244940052.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/xozurakupanajigujifajid.pdfIn PDF document text
    • http://ashioke.com/images/library/File/maratulaxovekale.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cf7d3b66c---xeteroxuwuburijodibe.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8ef549125---vesexamenagalimeb.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608a068d67ae2---kapebitazogazidavuvo.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30b8955842---dijedojupiloli.pdfIn PDF document text
    • https://tmtteks.com/files/zibelafegenom.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b8242baf329---53941339066.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/61398273948.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/41221993464.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/wezuderapuxuditavexu.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/13743767316.pdfIn PDF document text
    • http://superpart.com/files/33216498080.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/70c5f9b5bf8f8edc4c9e506e8e6e9991/49138052581.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/495ef4ea07c3697c19b31c29060d46c9/30010926845.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/jizagodedegopuban.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=hardship+license+requirementsPDF link annotation

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