Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ed7caaf41b3ba3…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 03:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1690ee9fc1fa2932ce05868309b1b1ea SHA-1: 1481a6f2fffb66742f424268f3518358f5757fe5 SHA-256: e6ed7caaf41b3ba311fd54a97a06105eb9157cbdc8ecfa603322214b66451f27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and embedded links indicate an attempt to exploit users through compromised external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sofupingame.com/calisma2/files/uploads/sofekudutiginafujaxiwuse.pdf In PDF document text
    • https://martabaktelor.com/contents//files/zukodogufiparadijewakasin.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/32695851898.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/j31o76lttbo2mafhjfr4kq3i6f/bulujubasivavaf.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/tagibesuwuvajitiva.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/42335171124.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/86041259396.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/31594531299.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/65219529301.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/79830678579.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8f512976c---96261575870.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/0k103rk5miu8qphfeit35pr8q7/36100969816.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/1dc6df9e12a3d7a994c1b7f6a2e4fcbe/11662954387.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/8020123857.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/95789990389.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/e9f0f618569c81c2406e6084e158e039/farokajabowu.pdfIn PDF document text
    • http://www.heksan.com.pl/file/vasuxemupowofukegozu.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/sudujabitosam.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/novizovutagaxemalug.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/65132477876.pdfIn PDF document text
    • http://iphysiology.ru/upload/jelefazujurudunonifafen.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/huv98j0ps3lnu7quaq2no93ql1/85035080336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=is+isobutane+saturated+or+unsaturatedPDF 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_off0000df02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 10388 bytes
SHA-256: 9638f2fb7c2ec02377d166706da09471b15a2821a88f7c770bdb16280c08194d
font_02_sfnt_off00010ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC1 17116 bytes
SHA-256: bcb6a46c79e0c95631e9fb9549e194d0b5855e0735eefe0bc728b9e0e89202cf

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