Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4f2ad8c12ca45c…

MALICIOUS

PDF

79.8 KB Created: 2021-06-12 05:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d1a86ac61f2c5c08ee821baf9515bf45 SHA-1: 64966b5fb63e322c6a179cbd77bccba3113bfed2 SHA-256: 9f4f2ad8c12ca45ccdc7afd2e7a2888be4e3d4c5365d722fbb838deae265a274
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous embedded URLs that redirect to various hosting sites, many of which appear to be part of compromised WordPress installations. The presence of a 'utm_term=jdk+8+64+download' parameter suggests a lure for software downloads, likely to trick users into installing malware. No scripts were extracted from this sample, but the extensive use of redirecting URLs points to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9461

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nomylo.ru/uplcv?utm_term=jdk+8+64+download PDF link annotation
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/3ae69c6ef502fa24b2015e9b179b1d5c/gaverigub.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c6f76a706---wukubusoxowepikudofodi.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/97939478914.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/83016460586.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/bc6cd672f5a4000cba4e3e221e5ebdc6/58362999136.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c01dfdd4bd2---8306842324.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/jexuboveza.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/53905745008.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085bba27bfa5---lenoxa.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bfedf979277---58444507009.pdfPDF link annotation
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/015e04e50cb772f1b041ed99a5742d06/banuwol.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16080e33f1a5c1---jarixisuj.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761618682da---4720775882.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4e21072ad---75131420142.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/rijogewaronog.pdfIn PDF document text

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