Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce908558991ff1fc…

MALICIOUS

PDF

101.0 KB Created: 2021-09-23 20:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cdb05a7fbe6c2ced6043ce712a10e1f1 SHA-1: b13c18a8042f69f78a4e9a1abe1839e259d312ad SHA-256: ce908558991ff1fc6f03f2eb4c73e4a24e07dceaec009ed6105ddcaf6b87837f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://oniceh.ru/uplcv?utm_term=the+revolt+of+the+elites+and+the+betrayal+of+democracy+pdf PDF link annotation
    • http://clinicaveterinariamontecchia.com/userfiles/files/wowipunegebasiwerokisifed.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/lulirutumoxilobu.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/lesarezipewiwopemef.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a4d1d17266d9fcfa96aac9f0836ce32d/jibidilufanevinepupajunuf.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/domelojowemoxud.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/ponifiguzasonewetof.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140c41b4123e---80766671800.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///mojiganomoradego.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/ratagulogafudisit.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/perofabexewoxamimesevuzu.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/43058208685.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///gazabilinajilatawi.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/44781297549.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/funorezakowixogamor.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/fitolowemuluxekuninase.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136203958bd7---wigimilalavaxeke.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/zatezis.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/fanexusajirim.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/4583110566.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73168015964.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/nokutuva.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_off0001225e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225E 18896 bytes
SHA-256: 62d701903954e858b5412be5d3a02827e3b4224d40a65e8535392e37ba881dff
font_01_sfnt_off000153ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153EF 11168 bytes
SHA-256: 7bf59a0ebdc6403e051439cffeb6ebf992ef277db09cfe4c7b42b8b194b2c77d
font_02_sfnt_off00016db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1