Malicious PDF — malware analysis report

Static analysis result for SHA-256 d189deb9bb9fc621…

MALICIOUS

PDF

74.5 KB Created: 2021-09-18 09:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ad4db002389450b6256bea3f7860e8dd SHA-1: d0b7293ca92952d42699389648083a41c2f9d264 SHA-256: d189deb9bb9fc6211d3962dc2d1f1834a0443238cd9f156aa44d636a48ff4290
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document exhibits characteristics of a phishing lure, as indicated by the 'Fake invoice / payment lure' heuristic and the presence of numerous external links, many hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious content, potentially exploiting vulnerabilities for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://immsac.pe/sgi_userfiles/userfiles/files/vuduxilutejusosut.pdf In PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/asfor6lm28f3sq6u5mp07n4rv1/fosilumepilazobenumum.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/86541417449.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202191314470.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/69994637158.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/debewisanoluwenudomorel.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/notab.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/99671998166.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/vurowoxogujosovovepu.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/dixetaromapunolapabupubib.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/53503012674.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/32175578575.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/27091476531.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/a87f1e4e9474f7378eb73060fc362871/weziba.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/tunofibelopejunamoziboxe.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/21916849197.pdfIn PDF document text
    • http://msiutilities.biz/documents/pufefijison.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/ludukepodupurubijuten.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/46934812426.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161382a144cb8f---20890942320.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/lifezugigejawaxoliseputap.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/1823790401.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/77096443288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=example+of+financial+application+softwarePDF 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_off0000c1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E1 10812 bytes
SHA-256: c0f89d177cba647915b94afebccff67be5c2c9ee7cc890c433247af6aa52f95f
font_01_sfnt_off0000dad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 16152 bytes
SHA-256: 8968d9c804b4a53a07d126d44e032b17baa3965d6b48a65b294e3e66a7ce21fe
font_02_sfnt_off00010484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10484 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.