Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e6747580905dcd…

MALICIOUS

PDF

90.9 KB Created: 2021-07-25 20:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d3819b324f650243e77ca36f8b78f197 SHA-1: 772170d7d9e0857d8ebff3c2999567c1d77efe62 SHA-256: b8e6747580905dcdf473099c17dd27c9d5f111da288dbee07abde3f05b93eefe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains a link farm pointing to multiple compromised WordPress sites and disposable domains, suggesting a phishing or redirection attempt. No scripts were extracted, but the structure indicates a malicious document designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://xn--b1adcbbai1bezln.xn--p1ai/content/File/dakifomi.pdf In PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f8e53ad4c---fagukexaxoxezinebeni.pdfIn PDF document text
    • http://celiapopememorial.com/clients/4/45/45605e685ba8a3b32f56966823665796/File/50979660281.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0e9f03034---77866954444.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/notuxupen.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/mjm2svcr13ltf6lsd47ogdr790/32796831685.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/ab77ab9cd2ee95ce8ee70b7b550a6299/kamumosimuranokakulebo.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777f3eaf3e9---83860267112.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e4cf86d76---todubaxulubax.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/jukive.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/fafejozunezepa.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/durewufubadovamaxu.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/e72b1df229b601922f17f613fb773594/20325417963.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/0c6b1258d0e55678676fe6a3715569be/29952637387.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/godadu.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/lirogipov.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084544905ab5---xudasujanomerawefoxebawiz.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/91868694050.pdfIn PDF document text
    • http://www.dafnimimarlik.com/ckfinder/userfiles/files/labelulenawo.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/3848231379.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/tixasasudukaz.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/35916951586.pdfIn PDF document text
    • http://whatdwellswithin.com/file/86208494582.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/genobox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=what+are+the+components+of+active+listeningPDF 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_off0000ff0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0D 17012 bytes
SHA-256: 9a001a39d0996e8190620526a0b4b61df1f7718563da63a055bef35e12304bd0
font_01_sfnt_off00012b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14378 10984 bytes
SHA-256: 037aa89ce293af3d2dd73d943da038bfa7510a199e1825fb2099a6d177f633f8