Malicious PDF — malware analysis report

Static analysis result for SHA-256 42edaefe1e66888f…

MALICIOUS

PDF

74.7 KB Created: 2021-07-02 16:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d36fcdd86af36fbdc207fe7e6adbe00b SHA-1: 10563a4963f7ee162806801f0de0533ff1d843a2 SHA-256: 42edaefe1e66888fee5276d3a6babfd2cda38801a0d5554a1c053347203fe965
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure users to potentially malicious or phishing content, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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://chcial.ru/uplcv?utm_term=15+gallons+is+how+many+quarts PDF link annotation
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160949770d7264---kasavokos.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/558a366d60005743573156225e6ac4af/vijoranulitanenudojixu.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/bcm0h02g7df4d7241416126f42/43265805668.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/8atgh81ugri624fihnom5ppja1/17810423549.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/fojadapokizole.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e766dafa5e---24058054914.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/d81b7d7d668a40b82bf2c5e82d573ac3/73759450235.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/11455629774.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/94449466126.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/zuwenugiteja.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/titezasabuxoxetezu.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/25787705061.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/visirig.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdf93aadc0---nidovumakera.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16090962c14d34---75274062755.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/tnr2c9r38g90d56vu2d6corab1/zoruvepinojunokageg.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e76d04f6---25186396876.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/f13aaceb4c2369fae7b146602f10341c/jopuxewulut.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3129d3c3587a4a96fc6f988393ef0d42/5950941827.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2f16b3ddb437533f8cde2b8f5601357b/23056305225.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074831fa503c---wanoxepegemijiluko.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC238 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4F 10956 bytes
SHA-256: 889c95fbccd1861aa776921f4109a53e524f87a58d6cb77943699ab6ae4895f4
font_02_sfnt_off0000f34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 16380 bytes
SHA-256: d432f9810795b25c843f70e868a033b6312ea8c3b99825fba146395c4e81dca8

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