Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddf04cb85b0a052…

MALICIOUS

PDF

94.1 KB Created: 2021-03-22 22:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67b3b558a70f64e687935d525b1b7aea SHA-1: 966cb30605a6fc53c1dd8f18727eac59b26ee0bd SHA-256: 9ddf04cb85b0a052c3b94a5265d18b48e75bd294f8c9f139e3c7cd10cf6c4b72
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to benign-looking PDF files, but one key URL, https://vilenefex.ru/award?keyword=microsoft+access+vba+tutorial+pdf, is flagged as unknown and is likely part of a malicious SEO or phishing scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to distributing further malicious content or phishing. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=microsoft+access+vba+tutorial+pdf
    • https://cdn-cms.f-static.net/uploads/4498882/normal_6053c174c9839.pdf
    • https://static.s123-cdn-static.com/uploads/4454967/normal_5ff65752485fb.pdf
    • https://vumukawa.weebly.com/uploads/1/3/4/6/134662430/jukulolodopolew_lefinirowesexut_dofogabaveko.pdf
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5ffb4ed6f3dae.pdf
    • https://cdn-cms.f-static.net/uploads/4476273/normal_602ca68ec976c.pdf
    • http://lumosazef.iblogger.org/hp_elitebook_2740p_ram_upgrade.pdf
    • https://sunutefe.weebly.com/uploads/1/3/5/3/135350425/fudurelilalera_kejexasa.pdf
    • https://s3.amazonaws.com/wusone/reset_maintenance_light_99_honda_accord.pdf
    • https://s3.amazonaws.com/kaxukok/vejalijofofuvarukikuv.pdf
    • https://s3.amazonaws.com/tuxutedi/ingenuity_baby_bouncer_recall.pdf
    • https://s3.amazonaws.com/tisegovofu/naximu.pdf
    • http://libunasufukif.epizy.com/89417657405.pdf
    • https://s3.amazonaws.com/xakusineba/26196905257.pdf
    • http://lovafis.rf.gd/dolisekotilezutugurilu.pdf
    • https://s3.amazonaws.com/nitajosasa/lirr_port_washington_to_penn.pdf
    • http://nerokezixuzat.epizy.com/best_small_food_processor_consumer_reports.pdf
    • http://rufizugo.epizy.com/monomers_and_polymers_worksheet_option_1.pdf
    • http://xibubew.epizy.com/59382611672.pdf
    • https://s3.amazonaws.com/wunupalezozerud/wepalimuzubumirax.pdf
    • http://doxefozogad.epizy.com/how_to_do_table_topics.pdf

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