Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d079d90e76fceb2…

MALICIOUS

PDF

79.7 KB Created: 2021-08-18 08:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 97dfb718cbdfcad77f3fe58499c09762 SHA-1: ca1007e93a7344c1506c992e320247ffefaf3c0e SHA-256: 9d079d90e76fceb288ba50ff41566f38f3715a124ecb8b411afaad7246c8e819
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the 'Password-protected archive lure' heuristic suggest the document's purpose is to facilitate the download of a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082e0088c26f---wanugefanujilino.pdf In PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/9ed8fd3e5510f2ce665f44bcdfa0ad2a/94163547600.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2b5ed34ca---xifewukokaxuniz.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f670ba3c9dc2cc8694fdc5147f7ce58f/zetevizabugigafubesij.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/a1foo9t245hjnp7h2rj2a58avi/fusapidifemozubo.pdfIn PDF document text
    • http://esangsok.com/upfile/files/35672082195.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079fa279efe2---wepibixipopakuvapadibijel.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/fovilezijuvu.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1620973877.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6ba3a05d2---90227870630.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/mopipotisim.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/zesaz.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/9b8afe337189467ed59cf95eabaf3ffe/xorexogazivijeve.pdfIn PDF document text
    • http://voijin.com/userfiles/files/sujodanurigirezebibe.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/34188844235.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/l8crbqqacr9l87l6eefqlhhne7/98985925609.pdfIn PDF document text
    • http://webatnet.de/ckfinder/userfiles/files/gedanalil.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/numavugokujivedox.pdfIn PDF document text
    • http://iucecb.com/files/file/27331589961.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/vsu3sp04a7hd8kh2u5rte351lq/wulagotedukofivunojugol.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/79595363542.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/24141098285.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=gta+sa+obb+file+download+200mb+androidPDF 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_off0000d1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C3 11020 bytes
SHA-256: 829de74b3d7e89001945ca67f9f97cb75d13b27ed9f93645cf075a8f3152e89e
font_02_sfnt_off00010378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10378 16464 bytes
SHA-256: db866f9fa68f0ca6b44031a6724d85543628eaf6dbe20587477a941d63e58e8c

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