Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba01508e4df4d77…

MALICIOUS

PDF

90.2 KB Created: 2021-09-21 21:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1e0a871c6f95df60dfbc19fd7ebcffd8 SHA-1: e7f034da6a1905b42fd3fc4910c8851e4054c3d8 SHA-256: 9ba01508e4df4d77af0af4205c0e71e5aa0532a0408e33f08b13bc60d8338b97
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious content. The document also functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. These URLs are likely intended to host phishing pages or further malware payloads, indicating a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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 https://pixomot.ru/uplcv?utm_term=best+dua+for+parents+passed+away PDF link annotation
    • http://redactron.com/userfiles/file/39883215213.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/30650558977.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613719f9bf950---govitelanivulobemakoful.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/1493196449613be163d136f.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/88763332880.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/17722309000.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/naxiweduzave.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/38845930480.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/nizisuvofoxikizodo.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/20681308647.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/78268767051.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/34755526942.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/pijemikidijapaxipalasu.pdfIn PDF document text
    • http://centrons.com/uploaded/file/157585532061495f82c65f5.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/91055789865.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/725fdcaceed59062205169a470dd753a/35087809791.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/sapapadazelusafobawadid.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/13883718691.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/52159820527.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb239095bd---pexusulusupareluxuponosa.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/43641655566.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/vogeb.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/36034384663.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/42878689659.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/pupudopozopivisozasebiwon.pdfIn PDF document text
    • 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_off0000fcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFF 17532 bytes
SHA-256: ae56293c3e6683a8ba02e7293fcffab6140c672c7142427aae8033f9a5b25592
font_01_sfnt_off00012a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14225 10708 bytes
SHA-256: 150b50c6ed9aff25870df7a2cc26798a71e450ea1f464967c47d423bbf2ca7c2

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