Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d70f219817f141…

MALICIOUS

PDF

67.8 KB Created: 2021-09-11 21:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6e122fb077b7cf48cfdf725902f546b4 SHA-1: 10504af24254cc453c1339f6670bb18ff434d005 SHA-256: d2d70f219817f14137f17aaf80b3c7d495b461d279af7837eb47a0039f2fd4d1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to various domains, many of which are identified as link farms on disposable hosting or compromised CMS uploads. The ClamAV detection and ML classifier further indicate malicious intent, likely to redirect users to phishing sites or download further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5395

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://8cj2aja7-8mxb.com/contents/files/vuwodosadubimiredafata.pdf In PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/kulisuj.pdfIn PDF document text
    • http://miyisz.com/mingyi/images/userfiles/file/73841937841.pdfIn PDF document text
    • http://exim5.hu/_user/file/lavasatoludafe.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/timejemikapotelurirere.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/2478655511.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/gogifijatipugikoj.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/xikosopepojunole.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/nunaj.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f995e8089---falapisarifukinatigovewor.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/97985270843.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/pesupuposudejelaraseba.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/39760475263.pdfIn PDF document text
    • http://baoveantam.org/upload/files/mojubojulukuvosalabegumuw.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613625e314f2b---5489607927.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/25879776294.pdfIn PDF document text
    • http://czyxchem.com/upload/files/weruzimabimegezijawibi.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/53758710850.pdfIn PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/36777639750.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130f7a5c2ef1---vonavigudesavenoba.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/vuzaritajukaxabep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=nowy+system+androidPDF link annotation

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