Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b301d01c12f7f65…

MALICIOUS

PDF

72.5 KB Created: 2021-09-01 01:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 85d0132ec37dec9bae8081e14d7ce05d SHA-1: ee62f338484f0ca1d03f59a8832a87aec3fcaee2 SHA-256: 6b301d01c12f7f65e6637e1954fc0e50ee14740ecca07e62f323f466cc37d50c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to compromised websites, many of which host further PDF files, suggesting a link farm designed to obscure malicious activity. The 'Remote-support tool lure' heuristic indicates the document's intent is to trick the user into installing or connecting to such a tool. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score support a malicious classification.

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://kasystemofkarate.com/clients/861259/File/68901055590.pdf In PDF document text
    • http://pinturasoltra.com/images/slider/files/11620722352.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf599cbab5c---45580774111.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/fbf6c89e49ada9643eedc8fc93da4c70/tobapope.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9fa2114e5---85358301013.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/5b9aafbbeabca48cea8e451e8a6f365c/90043238024.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/demixufosezarojobidiluw.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16129381f8f299---rigajotimagejajijoj.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/vusasusawarujelixamanana.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d3fd980cc---bawodumusego.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/zukorasatowagezogisefexi.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/56824119924.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/7531630d8cb99adf0885535a48af7a42/42255617051.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/tojetuwo.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/67839371331.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089422a35670---fekebanefibu.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/99374224295.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/38953678395.pdfIn PDF document text
    • https://ahha.az/userfiles/file/galejevurinulokivolujit.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/gevagoxunejibujonifofebob.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a7af8b749---94790668971.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1b24bf6c1348916acb69169aae1808c8/22413703530.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/43805865959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=bad+girlfriend+mp3+song+downloadPDF 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_off0000ba40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA40 15556 bytes
SHA-256: 298910c5fa86e30c5e991ac31fc94fa4e1edccc064a469efa260c02f02e9b8c7
font_01_sfnt_off0000e24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA61 11056 bytes
SHA-256: da0ffa35b12cb217e22b1fcd3541ea463327655431d008e2c10a010f214a574a

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