Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed58e4c449bdce6…

MALICIOUS

PDF

99.6 KB Created: 2021-08-08 04:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 618abb901f22641d90c2a56535266db2 SHA-1: 96b2c1c1002de2bf1aab893ee30beb831dbcfd01 SHA-256: eed58e4c449bdce668ebe7d8ec6bfa70f7b3a1d078440ea9cfdff3bf824da102
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple disposable hosting domains, which is a common technique for distributing phishing pages or malware. The ML classifier's high confidence score and the specific ClamAV detection name support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e8a4bd145---9819936351.pdf In PDF document text
    • http://heorungminhphat.com/luutru/files/vazogisodi.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/56608361016.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/81ab097f83800214f3f09e94bf05f2d7/87548544304.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16198618708821.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e67bdcbcbe7---kusevovo.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/32419304339.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/uvoefv0f3fu1l7revmkfhk8pha/tulixavodelevejalow.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/farunum.pdfIn PDF document text
    • http://skrn.cz/pic/file/97084271694.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/fezakivuvutuxavuvoturonuv.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/bugiritotemolomuroba.pdfIn PDF document text
    • http://sb-78.ru/files/file/79399431218.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/71814020536.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/32522331431.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/9faa68f26f65db94145a0053d209df58/62819818456.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/16921892624.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/xureketizanedomogopo.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/mejewarexuregabolaxumipuk.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/19c3d3a0d51fd3c9650b75b873864a4c/nigolenozevopibip.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/sigeligetipoxolediled.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/30491012207.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/zosotawedidamepawolipi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=reparacion+de+computadoras+automotrices+ecatepec+r1PDF 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_off0001183e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13050 20388 bytes
SHA-256: 2c529a67b3b7913fa3244d731966024ab20bae94a63059606ec67b37ab470fcb
font_02_sfnt_off00016437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16437 10824 bytes
SHA-256: 3093af8e2b63f0bae33c7fd005dee5843c9c133eae4a8bedbfbef2cc86309870

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