Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe5fb1fb5b281ca…

MALICIOUS

PDF

62.4 KB Created: 2021-05-08 00:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 309344be31847fef305860c10e6ff54b SHA-1: 7dfce0eb584988eafd3a0513d01e51086b366b80 SHA-256: bfe5fb1fb5b281cacddc16ef63e2393e77c91a7cc208421533b32025c35d9dd1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The embedded URLs and link farm structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://huntic.ru/uplcv?utm_term=marlborough+district+council+annual+report PDF link annotation
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/4cuo5ecqdvtmm2jlk3l1lk84di/tuvifikikarikirarufat.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/bazibijejof.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608abbfa4c50d---pusut.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/paguzeja.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075b1a904492---bisilanesep.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a64e60449---gezejipubi.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/b003f86fafe99f0a6d5f9f81b2e6e86d/11926531298.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/0181e45920808463d633452d29253b2d/bexofaj.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6a3cd3eb5c259f12f23649a904b61412/40746289363.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/fvjc4398e0m50fncvai7cc45a0/75930675534.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f352fa2171---gikabavojozukupoxujazaki.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/156ea39a9e0c2bfd5e747916371e3d1e/bivudika.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/73e9d9dada675e5bf1f06c1058d20447/10807562249.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/0277bc40a84af93cd691521b5d9766cf/pitimibaba.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/59nkpq0jc6aacq9ao7hm7m0507/geponebikaguli.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/63426736125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC95 5480 bytes
SHA-256: 66ad17d57a15b24555c4ae556f0eb5995df0ced7a6e4486a73ff8197a21fda8d

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