Malicious PDF — malware analysis report

Static analysis result for SHA-256 097163d023b8d0da…

MALICIOUS

PDF

148.1 KB Created: 2021-07-15 15:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 899e13fa583a2b9a00fae87d63532ff1 SHA-1: 0edf72f6e063ec89eda0f6652b0f22d3e1532224 SHA-256: 097163d023b8d0da0e60353464a8ea348960fe506060635259215e6fa7191767
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/9cdf72f00633cffeedeff916e7b85d7e/xazinowigigel.pdf In PDF document text
    • http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/79804753769.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/xewanupebi.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/zikila.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ti11rbroupuhrs7h6osmarm060/zikimexevudiwiriraf.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/92385512054.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/f20sn17aqne7h0pqrmrsu85gq0/tejatunevos.pdfIn PDF document text
    • http://st03.it/userfiles/files/73182142600.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/dozixatafobid.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/h3opmmuudfa1ogetcijqbknll1/19303826163.pdfIn PDF document text
    • https://umartravel.com/files/67439602408.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b11accb43e---levegofiguni.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/802ef783e981c6a5969d38a60746719d/60660799341.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da2c79229e9---56985027014.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a4bbf229d0756a8db1e99b64d55b119c/jojap.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/wulujikonegiw.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/bitovutabenokitorakilelu.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/26291204509.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/99868245190.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/32193788458.pdfIn PDF document text
    • http://cecev.com/stockages/files/kexujoresorifuf.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad67d6622dc---veduwidake.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/28b6d53007eafaf4c94edc839c482961/57268717983.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/1aacd4523d61fa525cbb056cc01854d8/vapezodo.pdfIn PDF document text
    • https://semut73.com/contents//files/71423441219.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/demagoxuwelakawupato.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/kefuga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=fight+club+is+marla+realPDF 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_off0001e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E284 18292 bytes
SHA-256: ee126c3f00637635905bd9a2675aaa775fe0d863927343142c11a1c751ea61da
font_01_sfnt_off0002123e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2123E 10672 bytes
SHA-256: 2aed030d578c90df3f2726748d1b5023c83e26ecb84c7440d0e7b4964346c276
font_02_sfnt_off00022ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22AB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1