Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a85f7970304f6aa…

MALICIOUS

PDF

54.6 KB Created: 2021-10-24 15:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 733203e858a4a9e588b741924811b5fe SHA-1: 619a76e968255d8d43998b2db7b9d7bd06da8df1 SHA-256: 5a85f7970304f6aad65490d3d1b0a1380ffd34ebc3e0122ae201cba8b4e96bd2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6441

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=geosynthetics+in+construction+of+roads+pdf PDF link annotation
    • https://amgaa.org/temp/files/21090973537.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/53383176002.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/10596557475.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1614f9bd905d18---lerepeladakefize.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/54626022699.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/voxiw.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/87810519617.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/89283085093.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/tubim.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/b44e49a237cacad4e17bfa2db266c4c1/kanawonajupe.pdfIn PDF document text
    • https://creativetalentnetwork.com/ckfinder/userfiles/files/juvukifazuxitonufi.pdfIn PDF document text
    • http://ativn.com/upload/file/fofawumidivasukir.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/pavumiz.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/88919840998.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///gabik.pdfIn PDF document text
    • http://riviera.az/userfiles/file/50174590643.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/befewowavojigazugosebuzob.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/raroxedaroxokukutapodevi.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/5cbc14684e0a30416939670af93f2842/topiziwalaniropumasisef.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/56025780939.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/50341991384.pdfIn PDF document text
    • https://fanaf.org/article_ressources/file/linurevaxabi.pdfIn PDF document text
    • http://jodhpurheritagewalk.com/images/file/tewuragofuwaraf.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1616e362c6f21a---76111054035.pdfIn PDF document text

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