Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3df0e0ff1817720…

MALICIOUS

PDF

95.7 KB Created: 2021-08-10 10:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 898f5382424a72a30f68714021790a21 SHA-1: 55a8fc0e0e4ca88adf9030667e53bf7b0e0a6d0a SHA-256: a3df0e0ff1817720c4202c25504b55f00e06aa2774aa72f5ba7277c8126a8d92
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, hosting numerous URLs on compromised CMS uploads, suggesting an attempt to redirect users to phishing sites or download further malicious content. The presence of embedded URLs and the ML classifier's high confidence score support the phishing and potential malware delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/cd56d9c701a79a69947b3e019d1033bd/12407544753.pdf In PDF document text
    • http://domusanna.it/userfiles/files/4163534852.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/aa0c1872763acebf60ef4cc18339d295/74538008362.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/o7h5t5k8atud0j7bveja91jh4o/funatigawujogopedoju.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754e5e19ea3---74217610134.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/kamenukinubigukigo.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd63b76bf3d---26156385076.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0acea1e337---gofiduke.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607586f003e07---posunalosisonagefedeboluk.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/romavoruwurosanerer.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/wawosusir.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/3ccee268a6627093c29ce3571369a814/85118977906.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/31821569282.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/0e907cafbadc20c68d91168d740ebdd9/58705940571.pdfIn PDF document text
    • http://mobilieroccasion.fr/uploads/file/gesibokusudabavenu.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/51433925776.pdfIn PDF document text
    • http://wurbs-hanau.de/userfiles/file/jakako.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/5703797004.pdfIn PDF document text
    • http://hamandeggsclub.com/clients/e/ee/ee862789ee8b59d3f3d22261ccc35c80/File/bixofebewavebuxolujimo.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/dojajiguwozedusugodi.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/2pjvh1ao85ak6fjopvuaq2fikd/25409583655.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/bezuluzoxerojemafonezatit.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/davezidogimuwebubigumike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+do+rolly+pollies+eatPDF link annotation
    • 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_off0001124d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124D 17400 bytes
SHA-256: 335b3430180a1c37673430a1057c2ffa0fb378ac224ef25a32b1a315b60fa1d2
font_01_sfnt_off00013fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD1 10492 bytes
SHA-256: d6735e540114bed9d99f93fb94e67ef1e205cf7b54f896865112b1a57d05cbce
font_02_sfnt_off000157d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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