Malicious PDF — malware analysis report

Static analysis result for SHA-256 d345de2d55e2ba1d…

MALICIOUS

PDF

76.9 KB Created: 2021-06-21 11:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 60abc9be726d9df3b1ed6711b3971c64 SHA-1: db1cb5e466051f4cc41a781adf7bcff89f29a285 SHA-256: d345de2d55e2ba1db0eaa3ca9fc76b10cd32103ebf0cd641fa7bce00bb1efbab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple external links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pixomot.ru/uplcv?utm_term=dream+deferred+poem+pdf PDF link annotation
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609154136cf23---lenudelufiso.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/4c5gjj4gs259kepapro8bfvj3b/nokepesamexameguwuxudobow.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf9809234a3---87641877610.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/raxazujamezepopesot.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/3vf14frdsg5h1adsd9bfaierjl/lukodugos.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/a1ae554acb8053dc49241d205980b0b5/dujesepatojaro.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/53879069874.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a27ad55a9ce7f2d632a235e54e006118/1159872904.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/2c4263916df60eb082713501700f828d/topesodofudu.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/68305844556.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b1285d9b847---5470739291.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/jukipegoleb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 4976 bytes
SHA-256: cf70eddb6f5f0e4f522ca1ec39a104f828af15b72cad16103492a59b384f1fb8
font_01_sfnt_off00010160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10160 11124 bytes
SHA-256: 6b42c747a9c96d6eefa64f1ebf99552a39aa42b87fcf8665805357ff7063e5a8

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