Malicious PDF — malware analysis report

Static analysis result for SHA-256 294bd86e9ecd55b2…

MALICIOUS

PDF

77.6 KB Created: 2021-09-02 01:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0a3bb5981020fd81ce760c0f0c0d08f4 SHA-1: a01e5c21f62049da94e86c23dc5c33e6437b31c8 SHA-256: 294bd86e9ecd55b2ce495b67f16be6ee2be8beab21c5a29762c4dd16daeaf9a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://medvor.ru/uplcv?utm_term=apartments+in+cleveland+mississippi PDF link annotation
    • http://flexicourse.cz/res/file/93622188916.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/bodadalibofagina.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/42722352378.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/20240361545.pdfIn PDF document text
    • https://e-room.co/userfiles/file/luwozenunujawibavo.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/93192841881.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff46aac016---megoduzonolefomotufupipir.pdfIn PDF document text
    • http://sro52.ru/uploads/files/moramugalizawavik.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160911dfaf22e3---35854762575.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/464bdcf96298a2c0f9e15d336e0688a5/55436052043.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/tazomofijagona.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/41834681131.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/7f658888c517aa237313d22593a91d46/bifimowowabosalonalap.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/suwakuz.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/83629510593.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092413d5687f---98739563020.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xarevaxotebabesari.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/36504231046.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/verirededupajigox.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/30e2fb92ec303d6937e47c029a9f489a/25740257986.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/323a6abac6a126bf2e762e5d22ed4e08/81320103013.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/77539695335.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210617185626529.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_off0000ca39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA39 10604 bytes
SHA-256: 5926832a2df356599ee89c8bdf76d5e19ae8c7c25eb5d3e82d12e85aef4a3ce5
font_01_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 17828 bytes
SHA-256: fd5ee8e1852c0f2c99d64d23f34782f877bd9ab2e5ddc75a2e3c2d1d6a08034b
font_02_sfnt_off00011112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11112 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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