Malicious PDF — malware analysis report

Static analysis result for SHA-256 034e2686e9d8c3de…

MALICIOUS

PDF

94.0 KB Created: 2021-09-12 17:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 74b25dcff1aa6040e4241bf51a91b221 SHA-1: c39dfbdeea1cc10d6c7484879639c86706aca738 SHA-256: 034e2686e9d8c3de32ffd2233d5b753d5ff0b72d4adb3a0aa95352db5b83040e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs that point to various domains, many of which are associated with link farms and compromised WordPress uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://coretry.ru/uplcv?utm_term=moto+x+android+version PDF link annotation
    • http://pincodehub.in/userfiles/file/65606999715.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/jawojeserujabiwobemu.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/wukisilalojen.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210902131143124.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/84785606213.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/46399700185.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/71fc9253913265972e4033d62bdf1cb8/dodexajapijuxana.pdfIn PDF document text
    • https://alpinashop.bg/files/nujatotujimubama.pdfIn PDF document text
    • https://davnosti.ru/upload/gaxejubopelesuw.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/l3bgu2fdqfth9813nes10f2pgn/lolavedafenawaxidi.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/nidumukem.pdfIn PDF document text
    • http://vkp.ru/upload/global/file/43599122563.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/rogeveponatekapozanoguku.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/jewawijab.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/62519348984.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/1417618198.pdfIn PDF document text
    • https://gilbertems.com/videos/file/mabimewesawumigav.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/xosozijubojepokiguru.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/94047503266.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613679740feca---84560848290.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/3688730686.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130ea890762c---komasemezubanaxivixomes.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/38184990558.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_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 19440 bytes
SHA-256: 21a3052bf71c0b43d174b123f25628c87eca805819dfb47bfae20c48e5d6a1d4
font_01_sfnt_off00013a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7C 10356 bytes
SHA-256: 19bd57b638170f7bcee80cd5434d9e46948d64a864aba90e32b87e6b71529000
font_02_sfnt_off0001520f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1520F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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