Malicious PDF — malware analysis report

Static analysis result for SHA-256 468d5354f18b964a…

MALICIOUS

PDF

77.1 KB Created: 2021-09-01 11:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6bb7a663dc96eb7668d3e8bd0f7132a6 SHA-1: 2bd804b96ce64f329a238931dec6cdae4d167c47 SHA-256: 468d5354f18b964a5502096ef876dfb6529d66b8a96b6419a7126f594b2c5349
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous external URLs, many hosted on compromised websites or disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b881d6085---demumiru.pdf In PDF document text
    • https://mimpiindah1.com/contents//files/67691366016.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/25168375953.pdfIn PDF document text
    • http://01host.ru/userfiles/files/gesizekotor.pdfIn PDF document text
    • https://premiumtrade.ro/ckfinder/userfiles/files/32599634091.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/f3dc76b587362e183c55646196c6801a/54766106267.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/tebolisarenaramanenim.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/29849282457.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/jidotikubabuted.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/40483533531.pdfIn PDF document text
    • http://quadocdao.vn/uploads/files/96314109320.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b89abdaa4---josuledew.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/jebibimuvigowis.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16075805d99071---wudenizukeximukowerak.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210821192037.pdfIn PDF document text
    • http://lianbang123.com/uploads//files/202108120912008848.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a413af0b593---zevabir.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/86jav1gce8buofibqbmv5ujm1t/78562182856.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/kamivesowu.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/bazepuwatobapotufovoba.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/96160712431.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/71036549815.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/75817857684.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/4fb02838f2cbe2a7df811c4843c43dc6/kukokupesejevapatuvuve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=growth+of+mutual+funds+in+india+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_off0000c953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC953 10856 bytes
SHA-256: c5c203925af940a65651ea46cd0b4ed0a45eccdc9c3b2c493bd3af9b59560d7c
font_01_sfnt_off0000e23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 17060 bytes
SHA-256: c5e4a3c1a9ecae77029dc865f1ef1e71b947f210542e1f5566accaa5ab5a438d
font_02_sfnt_off00010df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1