Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ea79edaf090922…

MALICIOUS

PDF

83.5 KB Created: 2021-08-20 11:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 949990ae9afde930bcbd20742024e7f5 SHA-1: b29569d4fb75d4f5dd99891bde7f6984c8b25113 SHA-256: 60ea79edaf09092225ff7b514d9a5f235f9997d1cc4bd1c66c68f08b0df22a34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially malicious websites. The presence of multiple compromised CMS upload links further indicates a malicious intent to host or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://drafthe.ru/uplcv?utm_term=why+does+my+dstv+decoder+keeps+rebooting PDF link annotation
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/0b0319c7a94b7f4f3d50a2f67656aa72/gogeb.pdfIn PDF document text
    • https://vieclamkythuat123.com/upload/files/vexasulofezoxodos.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/pegazotetilikerawawiz.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c425dfe4889---wedofuvelimiwavuronuxibu.pdfIn PDF document text
    • http://sakurahoaanhdao.com/webroot/img/files/35052217240.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/61813967301.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/38024528580.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803b00c859b---fekosujiwegetamuzisojeder.pdfIn PDF document text
    • http://vhshf.de/File/59053380485.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/63897625178.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/godufujibobazetabeg.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c855bf734fe---89485407108.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/lakudik.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/veremuvujekitifodezulusi.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/paguwigabanenegajovozexas.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/k36pln0j1l8q1k0ouabh4vmgn2/burisugufagogogol.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b88b3578ada---meputekusovowos.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fddb06702---zewinipivoto.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce2b786f25---ravoloxuvoso.pdfIn PDF document text
    • http://premium-h.info/files/files/doremifijexopejojapuf.pdfIn PDF document text
    • http://julianina.dk/upload/file/76543406698.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210814005815.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/newinubav.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_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 17008 bytes
SHA-256: 02b878ad1daa21ca397bca75369fcf7f78f1b34a46c71ae9a6dea81937d9c2d0
font_01_sfnt_off00010dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAB 11160 bytes
SHA-256: 13836f20435006da916dddfd002bd44f8b1661fb47c5d99f7d708fe8e56d24b5
font_02_sfnt_off00012728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12728 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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