Malicious PDF — malware analysis report

Static analysis result for SHA-256 56eaf2ba0e422435…

MALICIOUS

PDF

82.4 KB Created: 2021-09-03 07:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 67c8d0bbdc9ccc2bcbc9d528e7dd28ce SHA-1: 60fbc06da78c89e90a54782c528bfdf569b4dd47 SHA-256: 56eaf2ba0e4224354a3df6d306c3b9eb729905e22ce28752388f97c849bdc786
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and disposable hosting, likely intended to distribute phishing content or malware. No scripts were extracted, but the presence of many external links suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://krisoc.ru/uplcv?utm_term=printable+math+worksheets+addition+3rd+grade PDF link annotation
    • https://client-sms.com/ckfinder/userfiles/files/fazedebaxig.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090583e7c6bf---8268649648.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/qmg1mt53b2g6gensoufu9h2i00/zedube.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/xixafisumivejun.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/b85e93edee5b130c08d5446462f020a9/dujekovegozeguveler.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ffcf4309f---39313930578.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/76179383687.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ffac3a7fc---mikunosadu.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070f4b51e4d5---43548662952.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/74371410285.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160719039bf8c1---monuxofegawovusaga.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/75524778218.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/16627392697.pdfIn PDF document text
    • https://cartolmania.it/file/48952460350.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/gco7ck561vmukdepd4gcvb7v7n/94082982106.pdfIn PDF document text
    • http://autovoda.ru/upload/files/6247223263.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/59217382520.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608df86bd3edc---webof.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608021cceb802---47276515031.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/722ef7900ae8ceef8abb43b0949ec4c5/xulilavezi.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/f8084188aae3c0c43bc4a7bce15dd713/91943904128.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210713044304.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/95699839349.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_off0000dc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 11188 bytes
SHA-256: 8a7c75b5fcf51a0fc52db4646067b351b424142c13cd12a0bd3837721e2e2fba
font_02_sfnt_off00010e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 17336 bytes
SHA-256: 4c60b85eb625a95195080790a96979471239439a007e1e7e0a293046dc245aa5

Open this report in the interactive analyzer, or submit your own file for analysis.