Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fcd4faf9bab5b7…

MALICIOUS

PDF

92.0 KB Created: 2021-06-29 10:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9d0ca5567ee0c1168ae43bcf82a17735 SHA-1: e5406503e6f54030acccc5e94eb559d3b6caacd6 SHA-256: d5fcd4faf9bab5b754520d4ddad2d31ded727ce01f9ee6bbb95b963c09f2df02
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution scheme. Although no scripts were directly extracted, the overall structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/81dbf91d98d9b3e948e92f0ad5f5585c/57003256693.pdf In PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160918a9f3cbcd---kovodop.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/xebusawizemovonumexi.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720b7fda9cb---poxaritulesuxukidunuvisid.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/bd6fe87804789f414e490fb1f63c1f8b/50847113464.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160870c91e3b08---51953916420.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/fopedomozukusof.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/nigapikovaketekomekaf.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/45405175636.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/0a28d5c681ccda15860c527f70635567/gozamodor.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c502ec06be3---90388968964.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086209630ba8---rawarozuwininagerukiro.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/gt6779jnlaj9o1qbbm8eef74q9/newibepumekirox.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/nezamevozixiwovisa.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/95e30925c98300f53601b2734272cc21/wijomobufovo.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74c9e78931---mewiwekitubibafusopaxet.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce4bf34bb---xeniwefalukafodibisog.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/74e886178e744e29b23c579d707d3262/30615067288.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/avcqrtj37bp5bh167okicv01ii/56602004473.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/36999852601.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/mixowarikuzamufovonezuje.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/89c6d6a6c87decdcf75f323241629f9b/jegipezisukowidejepad.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9333aaa12f---20159380730.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/lumixijabak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=infographic+ppt+template+download+freePDF 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_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 16868 bytes
SHA-256: 96ca44443776dcf53e0b458d776216d6762e4f1a76931a38ad1dce87f721abe6
font_01_sfnt_off000131b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B1 10936 bytes
SHA-256: 024565316378335a1ed70dfd5aad5b09e83d6bfd7d51d0a5069effb5b8e56908
font_02_sfnt_off00014aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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