Malicious PDF — malware analysis report

Static analysis result for SHA-256 205f292bbff4d741…

MALICIOUS

PDF

77.3 KB Created: 2021-09-24 01:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f27c59a6b54aebd1f5da64ca211d334 SHA-1: 4b30b257aa0849ff4495c705a8aebf41beb439bb SHA-256: 205f292bbff4d7417dadce29acb06752db1e5516d8254ab5fc8a91cfe7077917
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains identified as link farms or hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://harshahometutors.com/uniformkontakt/userfiles/image/files/38397035302.pdf In PDF document text
    • https://eventaipei.com/upload/files/sigevasumidoxudi.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/77173829358.pdfIn PDF document text
    • http://sushibelovo.ru/files/4960375635.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/wagipixikefupawogado.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/bakupe.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/61277452938.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/aa482a7f5a7719c2db976e044d072b52/jesanux.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/tozulotevemej.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/nisuferawutuger.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/63864716229.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/lokufugemobofalinafud.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/nakogezugo.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/futefivijodiwaliwafuni.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b210a1ac58---kinodozevexururajen.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/14341534165.pdfIn PDF document text
    • http://techbis.pl/files/file/72476668953.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/68899198172.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/1576340087.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161414fde59220---vudoputusavowudeguwag.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/70518927805.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/jeruz.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139616059378---74718081222.pdfIn PDF document text
    • https://angkalaris.com/contents/files/ditatapudevuloko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=seeing+444+meaningPDF 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_off0000ca8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8F 17952 bytes
SHA-256: 0d47434ac720b499a01a57d891db508aaff735f03d38cc65b1f0b9d9999457bc
font_01_sfnt_off0000f921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF921 10072 bytes
SHA-256: 1bfe4d399c8890c18eadb73f148324ec07afbe2ec6f8806be5026d76209de354
font_02_sfnt_off00010f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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