Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62659a8abce61e9…

MALICIOUS

PDF

46.9 KB Created: 2021-06-29 02:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 94a2a2a1e87d97b0e10916aabe508095 SHA-1: fef771afc7c5499ece4dfe1a93c06519a0bbf4fd SHA-256: d62659a8abce61e953ca39dc6a59d74b22f01b75bd8471e56971b5e0984d5d6c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to host and distribute further malicious payloads. The presence of external URIs and link farm heuristics strongly suggests an attack pattern focused on redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9418

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--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/188bfcb532ddd78cb6c1e51d44843891/46171864744.pdf In PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/qsnt9qgtjvoqfqk1utdfurr8m4/puvesuzig.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd72ef0894f---junevubusa.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/012e68ac80bd87d808f2b030e530694f/91385227646.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/31aef2be4a3415c1da7a9a1c7639ef9f/61433324376.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724f8ba228d---63655575739.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/1rn2krv6r5ra33ap912335evqf/nefupu.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac480450064---rulosimerilebopiwu.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/88594739540.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/18190311530.pdfIn PDF document text
    • http://landpas.pl/upload/file/29214992308.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609883752391a---24103372292.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa67203163---16188535148.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/donapisadodizalam.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/df4ae2071eaa74e2fea27d13190bd40b/xadujotogeraku.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086db570ed9e---64186243850.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/d5fc2eb93ad318c9c9d485a2108c0745/pasunexaganowadoxapax.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160947833ee631---91503578081.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05278c88a7---rusikemonoxerovilo.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/39fc89f945fd3cb33590ffaafe38d584/53877685958.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/68484700117.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/mekawataz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=working+f+numberPDF link annotation

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