Malicious PDF — malware analysis report

Static analysis result for SHA-256 5713c304c0595f72…

MALICIOUS

PDF

79.0 KB Created: 2021-08-27 05:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1115285ff3196fb45681ea62ec6ed62a SHA-1: 1c7d3bd2a5331b63aac3978b22d5682033b49de2 SHA-256: 5713c304c0595f72af64955266f1bd9e43824614d018ffb60a6b269c7370f607
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals the PDF contains a link farm, with many URLs pointing to potentially compromised WordPress upload directories or disposable hosting. The primary purpose appears to be directing users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4132

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://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a47ac89c2bc2a0be95f6b8c5d1da8101/fofozakugirujorosanekov.pdf In PDF document text
    • http://vce34.ru/attachments/file/32398466335.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/15132564238.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/zejojezulobifolipu.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/204db4b507b394ea4db44cae9253fa6f/kubugajezikebeme.pdfIn PDF document text
    • https://hirurgija.me//files/jisekizemiferowe.pdfIn PDF document text
    • http://yilip.net/userData/board/file/wuxetimurawegoxolukek.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5569ec120---toxubexifalokemug.pdfIn PDF document text
    • https://506hlapeta.com/files/file/loxemepuwewodafujed.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609d98e1250f2---zinewugaziwofelorapafeb.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079125ddf963---sigifadeduguti.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/zarusubawoketidu.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd547cabaa---jiluzega.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/21436930860d8da2a7b613.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/sagasisapunenanevumubuju.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16099e3dcd48c5---91235914822.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/9e9a90b77aeea5c5c8d6612b09abc636/28155834003.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0494b11e3a---99572458177.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/98814870004.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/80517122493.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/51439485794.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/78570638418.pdfIn PDF document text
    • https://ahha.az/userfiles/file/38809123797.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/jinaxoxugutoromaz.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/747a77234616997cbf746e2ae9017598/jasiwafekiwolematebawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=diffraction+problems+and+solutions+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/66d7f58c59133d3e2382923069abcb82/bijuzuvofudawu.pdfIn PDF document text

Related samples 8

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