Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7aaebdbded3b70…

MALICIOUS

PDF

55.4 KB Created: 2021-06-09 09:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4b75cf378ce50ad39ca3f155eacab9f4 SHA-1: a3135a0dd69217895b5746bc813b4c9eb2547812 SHA-256: db7aaebdbded3b70681fcf0d0ec3479d52cc380ae4b77d0049ad305cb9fc9e5e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'English phonetic symbols chart pdf', directing users to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7028

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cructi.ru/uplcv?utm_term=english+phonetic+symbols+chart+pdf PDF link annotation
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075012a5d029---gutoposakibutefik.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ed7e39ede6806711ecf5da44fbba8605/siborisidoxutofij.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608dafc60e268---xewilofakemanufunix.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/45488581226.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/dudatutikesufemazufa.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/pelilajorasakep.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/45d8777ab9d35247928438d7a4940c26/89316653246.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c18d2540e8---xefeviwuxifavakiw.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/a1d94a7f7e3ca0700fec360e0eb7f0f6/85136039337.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/9bc979821d819f95802a32e36084c1c7/55850393909.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/6235ee3dd6f1f63f52cdff65efbb90bb/magizavawipiris.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebb012f783---35688754517.pdfPDF link annotation
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/643edd17a94adf3124ff2eee3a979a63/difidanu.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/eb9ae630cf0be0a8d454cadfb4ac014b/ragetu.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/0d614bb6727b24d989ede02efca9f184/2729151135.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160736a87ca1dc---2314802767.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f52915b1f0---38710385971.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607831927ede3---naturovutezowesovon.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/357e6e776579d5990ed5b16b8834647a/17713537529.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6a9775da.pdfIn PDF document text

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