Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeef4d3e20e0095f…

MALICIOUS

PDF

91.9 KB Created: 2021-07-21 17:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd74d211cabb4bd67dd2a36176b8cf4c SHA-1: 38c6cf3a2139a4c3f17ae5efe274d8de8f316acf SHA-256: aeef4d3e20e0095fe3a85d5a827c2ae45fa2ceb36d37369d666c41d1a35b54d6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a link farm designed to redirect users to malicious sites. The embedded JavaScript likely facilitates this redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://etpatatietpatata.com/userfiles/files/41798538559.pdf In PDF document text
    • http://vivatbacchus.hu/files/file/88184297517.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/24503122716.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/7141173022.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/59257674440.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/fuzinebis.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/zugugofunetomadexixora.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/limigedum.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/11342114594.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/11618032456.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7c3ddc220---24865487528.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/29717724070.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2a65b5969420ebe3abaed1cd9ec88433/nabuk.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3628f074e---fudikemupe.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d60abf92f---71754720523.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897b769d00f---66744525303.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab78b00b40a---kafijaweduselegamoni.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/raxikoziwekuj.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/4477137061.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/rurokug.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/nivusebasivisode.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/tusiseberisivo.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/085d74a2820336b01c835d8a60005af3/82077338178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=a+civil+action+movie+worksheet+answersPDF 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_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 10720 bytes
SHA-256: dc4b5bf015702132e3973c31f4366abf279efe6b77b4ecc282038ed1f5e262c9
font_01_sfnt_off00011b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B72 17188 bytes
SHA-256: a91f868be9b5d94b23d3817021ca564e63395a55dac93aacf06c76e323ea04bd
font_02_sfnt_off00014813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14813 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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