Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef15fac034de12b7…

MALICIOUS

PDF

92.3 KB Created: 2021-07-31 11:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9e4efa129f56b6d9f5e6b37afc4f2812 SHA-1: c7a827dc494b79cb848aa09dcc3d62a1e0c12b0f SHA-256: ef15fac034de12b7f2fb7d8a8f3a8272b87c7f515d232547703ad4ad1fe7081f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites utilizing the formcraft plugin for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting and compromised CMS uploads suggests an attempt to obscure the true destination or leverage existing vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b1c22b723---bulipanavotovepubot.pdf In PDF document text
    • https://mytekas.com/UserFiles/file/62450596765.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086f29952abf---pomexujigerewa.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/gilotonafojit.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/363ec8cfdf9536a9218f931c9f737e7c/werigalipiwelasinagolezum.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ddc8c3a6bbe---gevugexejexobutikosib.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/7557478372.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/33362189317.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/18914545315.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/21793074531.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/wijevurotijezopin.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/51758555119.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/48670163308.pdfIn PDF document text
    • http://splogservice.ru/content/file/watokav.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4447e24d2---xazinuwev.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/79j381g10sqc252itbk6to60ki/sugovelufilitalatusiv.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/fefopamuvozedogazag.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/nepoweduberafikamaraka.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/38591785036.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607621cdbf4e6---nafipogaxodatizedipi.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/logudinurik.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8b650ff56e0a8850bb095e698285d3c/34294389845.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/bebabaw.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef8ac74d24---mukuvezud.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/efbb7e39ef205f1700da5a6aeb95082d/lekazibovoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=frases+utiles+en+espanol+para+viajar+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001028e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA5 10764 bytes
SHA-256: 89942d2aacce9213185ea4e1c77c5a60ad0a2ff6e8aa4042ebb635be8af76cdd
font_02_sfnt_off0001336c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336C 18140 bytes
SHA-256: 6cc1f712c833ca1c1f6bd8d930cd863ca28a9e03ab8675b94f30d4654bad4669

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