Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba2d86841f3e1b5…

MALICIOUS

PDF

76.2 KB Created: 2021-09-11 11:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fe9101ccfff16c67cfdf1517e74bf749 SHA-1: 0f9f1a102a93d66526b8b240016a06884f834e21 SHA-256: 9ba2d86841f3e1b5adff1d3d001387d7a4450039acaaaed5618a07b9dd59ce59
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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
  • 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 http://geraldinekilkelly.ie/54759947335.pdf In PDF document text
    • http://www.llmhospital.com/www/js/ckfinder/userfiles/files/nudefupewojisolazaridifu.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/dogigitubejarebi.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/miwukidekepufudabujujujav.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/93654617730.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/43714460433.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/mewirugozurilixowakaz.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137e9a5b967b---kititevapik.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/tenexomikidapojaravaki.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/93862898577.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134da505185d---9501115467.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/fotozarenowawefiwoguso.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/61493167091.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/porigevoforemu.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/61980742341.pdfIn PDF document text
    • http://yieldpharm.com/upload/files/lulasoteruvugi.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/ruduzapunojo.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/liwexaxumo.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/mowemedenerofusana.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/gexajitumanukuv.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/sujesavulusaxabenujuzot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=colour+having+shortest+wavelengthPDF 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_off0000c4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FF 10668 bytes
SHA-256: 45ac02a81c486bfd63cbd735a1807bddeb272a1bb59cde0809a134315ed91104
font_01_sfnt_off0000dd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF595 17592 bytes
SHA-256: aac74f7d46d2bc3d38c9ceb101d0f62a6868a000a97c2a159d939df30e491e51

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