Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bba6a88a204ebc…

MALICIOUS

PDF

100.0 KB Created: 2021-09-04 05:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e570e9580d1a3689c08b473169a6d136 SHA-1: ad08e5c7d957688432b69e762f558f3a3d4f5b58 SHA-256: 75bba6a88a204ebcf1cb0e40b399912846661046d27e58c532027544011b1690
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://medvor.ru/uplcv?utm_term=12+jyotirlinga+mantra+pdf PDF link annotation
    • http://aliglobshop.com/userfiles/file/79029603678.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f75443426f0---kalekerinotomuj.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081811b76bb3---diviluwiku.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/b4d9c500858f7308043d17137e19ef8a/54999584344.pdfIn PDF document text
    • https://promise-land.com/upload/file/zilexuviz.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/vudevazufixefopopi.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/30279575401.pdfIn PDF document text
    • https://protrialse.eu/files/files/72308218736.pdfIn PDF document text
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/xozubanosirumilavigidiwa.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/duzofosasabeje.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/xezijadatugarefisopopixod.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c472396ab9d---55692623616.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/zuvuziwine.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/30400334775.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/daxotoraxuxako.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096443562c3b---64930810300.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/vobenes.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087938c36a5e---nolopusi.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606fade5d9c35---19530598746.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/5633154542.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/wutidetuledavavebojamata.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/vupaxinavaz.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/wuriwifekasomototamolik.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/5014008794.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/aef6b9109d8823f9187656255f8b31cb/51885092561.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_off00011ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA7 10860 bytes
SHA-256: 873d864bede20708e1779e11396774dfc5651b32f7579df191b2770f2e48b099
font_01_sfnt_off00013782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13782 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F94 19544 bytes
SHA-256: a97157b659816e4bbe8776e8072af7ebcdd93f4c6e015f5a772a4f5ee7bc2949

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