Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaecdf6af6f48f83…

MALICIOUS

PDF

80.6 KB Created: 2021-10-13 10:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 263db5e912f8674c2ae6d8bba8525aff SHA-1: 50f2bc5a75ff8091e89922cecac0e4d358a80656 SHA-256: eaecdf6af6f48f836b84cd83b3a2fe217f0ee6a058f5eb9cb249dc803521db98
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 ML classifier and ClamAV detection strongly indicate malicious intent. The numerous external URLs suggest a link farm or redirection mechanism, likely to host phishing content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://33podarka.ru/pictures/files/puxoxo.pdf In PDF document text
    • http://alvit-bk.ru/userfiles/file/4641954207.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/24133114107.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210903_59E58536E1C191F2.pdfIn PDF document text
    • http://epicridesnepal.com/files/kewijedokepatulubuxumute.pdfIn PDF document text
    • http://siddharpeedam.org/userfiles/file/In PDF document text
    • http://hifitness.hu/userfiles/file/30395159998.pdfIn PDF document text
    • https://askflip.com/uploads/files/8138531757.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/12415029183.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/beluxil.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/kovolopaja.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/5a2af3af25a5c06aa0520757b8550040/22818608999.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/97110657878.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/dagapado.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/58115243666.pdfIn PDF document text
    • http://infunplastic.com/d/files/tidor.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/zononoragitoviveno.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/fabijefef.pdfIn PDF document text
    • https://thietbivesinhsonhoa.com/webroot/img/files/48283287831.pdfIn PDF document text
    • https://pecintajp.com/contents/files/60282730857.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/82995360556.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/6131a4393f64d.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/pagakolojozesapafo.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/74949379312.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/D9plVHj2VOU/uplcv?utm_term=2+yellow+cards+in+soccerPDF 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_off0000d573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 18636 bytes
SHA-256: 40322ccc65456c9440be68cc542e07c4528b66202093c2d87700107c24631f3d
font_02_sfnt_off00011ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA5 10488 bytes
SHA-256: daff3670d094d09d58070b5731e36ad8490677492c01c8d0869b663d796aaf83

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