Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda0e795bdb5bb27…

MALICIOUS

PDF

85.7 KB Created: 2021-07-19 16:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 708ebba8cb18962a7a2305003783d729 SHA-1: a340f9b50f9b00711aaf91ffa75cf4dc7ef423e3 SHA-256: bda0e795bdb5bb27329e33915e5958af97808f28a7a27a41d917aa5edd8bb86b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it's designed to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://statewideroofservices.com/clients/b/b8/b825a24af54c157c196cf52173d75bf0/File/kexuxipugevi.pdf In PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/lapozosaxedadakuwezuro.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/xovipikub.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/57000059667.pdfIn PDF document text
    • http://kaies.cn/upfiles/210625131654571452yrby81.pdfIn PDF document text
    • http://poorclarescork.ie/images/94791906011.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/jb8cgtd1r2t4dps2jjhsu91bl2/sawebusifasamoripuwewabe.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/39749955694.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078665b26d20---tadazatajevimininuwizuz.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/furodezudoroduseneradod.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/2748a628a3458342a452fbbe9936c2eb/wipinogeg.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/54730740385.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/s7nqit29iuat8bfhmqvlon90s7/60320748950.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608def3245881---xerudoj.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/3194721620.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8a170f3a6---tulapitiwi.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/kf8kdkuu4fjbq9e2gto5934r7c/91267815704.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/41703b78a62ab63db8c04aa77094aba9/vimifotelutesop.pdfIn PDF document text
    • http://rockfordauburn1966.com/clients/8/85/8549db0cc7d1f63cce07d3be93bd6f3d/File/vifuka.pdfIn PDF document text
    • https://bamor.org/userfiles/file/tedakalu.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/87127291451.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/wumebeketek.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/xigofawetijifoxip.pdfIn PDF document text
    • http://aliotoconsulting.com/clients/862286/File/13092232230.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4379c5cbdb---16920267074.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=is+the+sternum+part+of+the+appendicular+skeletonPDF 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_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 15776 bytes
SHA-256: 11048df24b42955feb9cb912b372550909e68580169ca3089b4aaafd15725753
font_01_sfnt_off0001156d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156D 11028 bytes
SHA-256: 95e3fab79afb41730ece029a56e5b7acf444a422277ddef28fd5cb199bc93844
font_02_sfnt_off00012ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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