Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76805a7f178fc6c…

MALICIOUS

PDF

111.3 KB Created: 2021-07-28 02:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e3906503e1533da014680862f93cc135 SHA-1: 943f4b778511d12605372b5063b77b1ebe37e77d SHA-256: d76805a7f178fc6cd6666017b4fc4f3a89ae8ccbe8f230a5ac67f389d4c88108
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

Heuristics 6

  • 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.
  • 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://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/723505e81ea54a6c3f36c1f6e623bf59/15995436355.pdf In PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721689882ba---kesekasegu.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/papazevezuzejuj.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/2l4lkg04hcs0upiqoq1i6bdh96/6686515381.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/ba3e839ee857c505a5f37307d6e304eb/80979147721.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/hkjfqpl8dq32rpr9m9ppb4r376/54531703468.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608929f864b0c---86115888145.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/94914582486.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/45ce12a9417f1fb2cd20ae7664e80b0e/jowopepodajexunurusujaw.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfa6dcd6a3---tonudarolilekufinagudet.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774b121c7ab---jixaxeki.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ceb9ab5fa---viriwolaviz.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/1fd9b22015289a97f04535d0e9f49564/18021389464.pdfIn PDF document text
    • http://aa-nusd.jp/35163932967.pdfIn PDF document text
    • https://rotherelectric.com/files/nilitizubo.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/96567810012.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081716322293---65347468024.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/a04ejbtsc5l894j2vjl1v0ob55/jajaxulugokunoxazumumu.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16083f3bb292d5---13263063035.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/palipumajabejipuwofeniz.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/pofenawos.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/21873789745.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/a0c23b95158a0e9b45bfd60db123aea5/31901529.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/32856346411.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b3bc11ec---wizuzuzusewalejat.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/f991eb745ce3e6a51dd91493c2152582/zalen.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090d587a1a2b---komakejidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=antecedentes+historicos+de+la+mecanica+fisica+pdfPDF 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

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_off00014e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8B 10868 bytes
SHA-256: e3b4bdd6ffc25369db76d9cb8fb90cd54c748e66b6fc3c944d300fa50032d7c0
font_01_sfnt_off00016779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16779 17924 bytes
SHA-256: 680aa855b7fcaae400eed1fc736b06906390e0090fbda8be6597a6e147903375
font_02_sfnt_off000194c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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