Malicious PDF — malware analysis report

Static analysis result for SHA-256 403886bd2d34c65f…

MALICIOUS

PDF

77.5 KB Created: 2021-03-03 01:36:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fa34e6db7e078140f6067839a83e02f9 SHA-1: 24e235e9ceaed431fd62709158412e2147b8961f SHA-256: 403886bd2d34c65f63399f2d69765351bc6a892c16b3eaf7e1365111beec757c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a lure related to 'Act 5 Romeo and Juliet short summary' and an embedded URI pointing to 'https://mezovuduw.ru/wix?keyword=act+5+romeo+and+juliet+short+summary'. This URL is flagged as a redirector for free-download phishing. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mezovuduw.ru/wix?keyword=act+5+romeo+and+juliet+short+summary PDF link annotation
    • http://phtech.site/62563480371k3ddn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5fec0931913b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474445/normal_6008ebad48974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_6017126c7e46c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_60364bbacfb8f.pdfIn PDF document text
    • http://liketime.fun/what_is_the_chicago_manual_of_style_formathevy5.pdfIn PDF document text
    • http://armlur.space/wurorufativedololalorabille7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisiku/api_gateway_cloudformation_template_example.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/the_good_girl_2004_movie_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/big_data_platform_hadoop.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/nibexugine.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/pawexufaz.pdfIn PDF document text
    • http://fojiguxojed.epizy.com/84221971755.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/romiboxibipukaxezasuve.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/java_for_minecraft_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/senarai_pekerjaan_beruniform_di_malaysia.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33F 5468 bytes
SHA-256: cbdc9b2bf9bb3fbd0b91257be0d02249394767a1d62ef6b3f0b380b6c0cc9a3b
font_01_sfnt_off000105ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 10496 bytes
SHA-256: 5ed3c89734c613d61b0181f30bfb97fbf47e2c43f9e4ba19562a25a5ee161088