Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed341ddea5ef78e…

MALICIOUS

PDF

81.2 KB Created: 2021-09-08 05:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b42a8be234323b5c740447073c986485 SHA-1: 6bab751abeb7aa3009372fff174dec14c6905cba SHA-256: aed341ddea5ef78e29567befb68b9f2904b3e58762ce8ed3fe19e6453a77350b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • 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://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/sokamelodusiso.pdf In PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b87d0b081e---movir.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3aa5eb4e4---57898486430.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/161024f047ceb8---44144019707.pdfIn PDF document text
    • http://seamacros.com/upload/file/52662220321.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfeb8c194a---69354014705.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/92808602129.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/66815098972.pdfIn PDF document text
    • http://rutherford58.com/clients/5/5b/5b2824e44de76337c32dfcbc3ee6dba3/File/gowatidedegarajevatufapuf.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210907_B5D577C2E42C581E.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/f7d64l0541ndtlo98t6a3gc062/vejit.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e50070aaf1---jitixolijeririfawima.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/zamuxigijaze.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/3l2c45h9pc7fa1udng50jm515r/pikarumesiwasifusev.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/zugedusapanado.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/3ba6ae3a729869600bd95c7d7f8def6b/sulodewesonaxaxemusoma.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/125d6734e6d767c09ee09ed8d32d8117/77746714813.pdfIn PDF document text
    • http://ajej.pretty-match.com/upload/files/vodidejewowitekufage.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/perasanabit.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/48030953795.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/viwusiwedudutagisaladozi.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/8cd881d7c29bfa5bf7807ae4d6a8c821/60020491537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=atlas+copco+elektronikon+user+manual+pdfPDF 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_off0000d5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FF 10952 bytes
SHA-256: b4b52a5334a08958261fa6abdbf15168b8cb472cdda3a93228afce8be5389f1e
font_01_sfnt_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10786 18596 bytes
SHA-256: d464a759712614d39369541bebe32b51443d0a8a59b3b841a7d6c128006b3311