Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada7296380424190…

MALICIOUS

PDF

96.5 KB Created: 2021-09-05 14:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 042667f5ff3e5cf2ce603839235e7627 SHA-1: a6d322fcf0c16a5bf951aa746a0a62cc7cb554f1 SHA-256: ada729638042419031e3b9abd248d3bad558ff1d847e84841ce381481b7f73c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://crewmak.ru/uplcv?utm_term=homeopathy+medicine+list+pdf PDF link annotation
    • http://dabaizhongxue.com/upload_fck/file/2021-5-23/20210523172907335919.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161010d2beac4f---31149210235.pdfIn PDF document text
    • http://cycling-software.com/files/file/kakizavafamedo.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/tobegoxokoxubij.pdfIn PDF document text
    • https://loctra.net/userfiles/file/48460701087.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/viwadozukapog.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a28b726825e---domixugezowafamiminekiko.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/579f40d6f67532bcc6611aca03a66302/riwemi.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/38961884169.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16095e4a9c4833---raxunopapakexanat.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/zexumaluzujeligatipenaxid.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/24127634762.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6a1119ba7---xugivepuwanereparewelulef.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/416011cf9ac95f86c3e19fb70e81059b/7550320213.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/natoxakebokupekupad.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/xosujo.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0ff6abf92---36520735463.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/65913113189.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/41404686819.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/pirokovodatadivel.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/a7i006au5rte3c1a0uipi28qa3/jasejewutevasojiluxabuz.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/fupus.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/9f2768d86c55e244d40d80c10ca93d56/77776622901.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/22396807732.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_off000116b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B5 17356 bytes
SHA-256: 742e26c8014cbaf7479d40e9b30761ecf721ec5f12447056553a9116ee1f740b
font_01_sfnt_off0001433c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B53 10892 bytes
SHA-256: 9a9c8e7370a9d8c44164831d71ebe9151aa48f0482ec0bca19862c77240cef8b

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