Malicious PDF — malware analysis report

Static analysis result for SHA-256 575fabc588119642…

MALICIOUS

PDF

71.8 KB Created: 2021-09-04 18:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 66f7a2bae5fdf62a3a960567ea24582b SHA-1: 03f8d8081c21ba03eacec9f27e832b70d1723474 SHA-256: 575fabc5881196422a4d9ad539af940e1240f9e9145f0de6a8af34752403ae9f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://chcial.ru/uplcv?utm_term=pyropen+jr+manual PDF link annotation
    • https://marblobathware.ph/app/webroot/img/files/renonotigakezixison.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0a24b9e58---sovugofurivoxuridugevad.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c398289a41a---47618407526.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/zukodogufiparadijewakasin.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a365e233147---lulejon.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/lajugud.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609da657dd9ba---lajelux.pdfIn PDF document text
    • https://ka-base.no/images_content/file/58803663673.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/panowojakedaguzitagejuja.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/kumexepij.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/26471485912.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/xalomojukemetizotirewi.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766b4e1be03---20978109385.pdfPDF link annotation
    • https://caror.hu/ckfinder/userfiles/files/70077484878.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/70234746794.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/93248395751.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/26e8n6tl9b3ocb51l19fubmqh6/24623183657.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fff0fc67119---tavoziz.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/c4hch2s41j7rm2eslgssp6o20f/98763547697.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5b24bdb09---24704083701.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/pabukili.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/30939616714.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/bewopugufefivi.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a243beee677---68251854343.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/34001824713.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/lolewen.pdfIn PDF document text
    • 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_off0000b856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB856 16236 bytes
SHA-256: b706552692088d8566d393dfa37454c8f69dd9cf47f5acbf410b6f8991c28482
font_01_sfnt_off0000e21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21E 10400 bytes
SHA-256: 70c7792d3c3a8936fa0e7ce6220ae96c86ada92bcf58df56a220b9d1d6c57e40
font_02_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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