Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e46a87ad5e1622…

MALICIOUS

PDF

87.0 KB Created: 2021-08-04 13:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a236484346f61d5c7d32751c79bebe71 SHA-1: 56edf933007baf65a4c42ba9f3fa7e59dc599c49 SHA-256: 65e46a87ad5e16228fae72aa89858f4661f0650b4d114886ec0d219ce62d67e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many hosted on compromised websites, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of a URL with 'utm_term=free+download+adobe+reader+software+for+windows+10' indicate a lure to download software. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • 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://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/bc8f04efae5f3651d2d8cc0f715a2866/gilazife.pdf In PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/sebisajugakit.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/76586121282.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160870ce0839be---suluwuze.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/42867821548.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/98120163466.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/23978800915.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160da8c523e5ef---zavigalivanabagurejaj.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/15831793903.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/haru1ilsc6osd1ml5rc88l4gu2/95935817396.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/jalapetedekenovemelazet.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ded4564148c---57610204129.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/42227729284.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/49481983222.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/23796856960.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/zotiwekeled.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/sikurikuzaj.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/ii72kj0qjt9au5p0pti7bhstt9/73465466482.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/difubagijelezotazidun.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/n22rqo1ij0qm38lkod1b5n0jv3/jebupefefadomodanuxuvulu.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/59158796975.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/6dee15hh61cpqcquqbs77504k9/marudexosugogotegereriv.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/13574673783.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=free+download+adobe+reader+software+for+windows+10PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 16856 bytes
SHA-256: 1fbf14f5162774a34e6f87b089be6cc8987b9047d77897a798dc15abf32d023b
font_02_sfnt_off0001352c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352C 10724 bytes
SHA-256: 72eea0335e78a17fdcf3150b4fd15c42e8aab86ca3389e325981094aa7ff06b0