Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e9e82ff5e25c34…

MALICIOUS

PDF

82.7 KB Created: 2021-08-15 10:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e455edad136a88e98c9989bb5e189484 SHA-1: a7e7d93123a035e8d2a56c3777286f37a97d5f87 SHA-256: f8e9e82ff5e25c341235a862f2fad8a469fd4edc552f2e5fdac859029e2dc0ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised CMS upload directories or disposable domains. The primary attack pattern observed is the use of malicious links to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://architettodrabeni.it/userfiles/files/gejawabozukivezeva.pdf In PDF document text
    • https://aokman-drive.com/d/files/lugelolapif.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/47543895956.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/24954348894.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/ropatalegufepidikoka.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210605_6DAC914E431AAEB8.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079751dea5c3---veposenurutabajerut.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/19345051722.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cacf887c8f---wadebuxedodavapowelusi.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160c7465432fe5---pareset.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/guroboni.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/42253679620.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/susodometo.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/6929ea93ef488437514af76338812b8f/sinixunodinusiduf.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/0075073b9e1651fce1be53d89a2212c8/41654858612.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/94128709873.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/seduvuberepirukitedofi.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/famafisuzamowe.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/cmqnoedfedhljbqr7hqibvpkg0/nogis.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/20267b9ae588505d6d3e44b031424242/58419289484.pdfIn PDF document text
    • https://2acontractor.it/images/file/janakog.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/nezepubozipoxelotawesop.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/6532e7a5e4c0fac0b0308d2a498829c1/55713120917.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/60898611185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=juegos+de+palabras+agudas+graves+esdrujulas+y+sobreesdrujulas+para+ni%C3%B1osPDF 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_off0000da38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA38 11216 bytes
SHA-256: 37dcf2fea2f16519260ad2cb9da1c3a67bb0cefcd3946a0e94208c7de8910f2a
font_01_sfnt_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 17844 bytes
SHA-256: 9d407defa2c63937656cc4105cbb4625be20b06bbb8c6d6ea9e240f2c8629943
font_02_sfnt_off000120c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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