Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b011711dae3059…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 17:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 20f1f2f4f9c6b05ea7aeb79f947a91ed SHA-1: 068d861231afbce703fcf629a9951995e6e43def SHA-256: 07b011711dae3059272a09fbe7c0051ecf360d78c6b2efc02f692987c2d81f45
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a ML classifier and ClamAV, indicating malicious content. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's primary purpose is to trick the user into installing a fake browser extension or update, a common social engineering tactic. While no scripts were explicitly extracted, the presence of numerous links to potentially compromised websites and PDF-specific malicious indicators points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://mitcostruttori.it/userfiles/files/41658415955.pdf In PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/c9570e16dd71fc8c748ca948004944d6/95632756479.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/39915660247.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e406e9768---kejolotinoje.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b599696f5f---10618084312.pdfIn PDF document text
    • http://synfarm.com/upload/files/63002299532.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/965b9a09d649ba4db92697ba4a7101d9/3795175034.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/fekux.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/f5a6dfd603025fded23073ea376228ad/26034491758.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcd15e098b---xuxuforapixatupep.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/xusonunomawom.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/jegld37ibo5v6gc4hmo7rdkith/90477786364.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608361ffdd1d1---66341647760.pdfIn PDF document text
    • https://airshow-bg.com/file/logijikabidazepamupudoj.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/xevaxilu.pdfIn PDF document text
    • http://totoumi.jp/upload/file/34733544215.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/71254930463.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3fd78956f7d12bb01c908cf998e93458/gerifunitotebo.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c7c1611ac---51438483062.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c0259b492---weporeputuxarolozufaj.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/papajud.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b3251114---vitanojubikigenubosotawi.pdfIn PDF document text
    • http://brownmahonefamilyreunion2015.com/clients/7/71/71b8b7811cafefaf2288418346dc0658/File/sipudavut.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/fuvozagotimufez.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/l2b4a44anrthqog1d982o2togu/sidolifuxibigaj.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7f6f4b0666321416ab953dafe3fadfad/96596878506.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=merge+large+pdf+file+online+freePDF 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_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF268 10400 bytes
SHA-256: 499f0e2402bf231497c62f5b8530e67f6af3d6e9b0bccc783ae3eef36e4234aa
font_02_sfnt_off000109b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 16844 bytes
SHA-256: 27542119924f1a6621b02f6caaaea8d3416e55a4876e100638f1c605b21c8e5f

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