Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b071c849417fd70…

MALICIOUS

PDF

85.7 KB Created: 2021-07-03 13:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 611ebf427591de1ab28817c0db4ee53a SHA-1: e0ba954b28e440c0aaa40d2d35b0cf1058c6be96 SHA-256: 2b071c849417fd70804ff186f6f3ac9b0651d2831e4db98e72db2bddba7b88d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links pointing to potentially compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=qualitative+characteristics+of+accounting+includes
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/mmt9j41optq55ns54eqb0erqt4/nebinigamibodolikuvunalem.pdf
    • http://muszempilla.com/files/file/16078638289.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b979ebf933---wolumivun.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3c3b97c3c---38738787344.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/0fncaa2oeiik4862g3ts6fpr3m/53718030890.pdf
    • https://adsbudget.net/userfiles/file/78700233600.pdf
    • http://domplus.su/userfiles/files/jukajufabakawulo.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c9667e44bee---gefik.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/fvnv9ia5todnvemvpbeel2oj88/18030031178.pdf
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/jijepozidadis.pdf
    • http://allprintusa.com/admin/images/file/zepukulavuxasotaso.pdf
    • http://crmrealty360degree.in/userfiles/file/76734126069.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863c45dff19---fowiwijozas.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/980ed502682931692d7667d40eeb8520/faxofutijukebujemevebof.pdf
    • http://a-swiss.com/upload/userfiles/file/zokojegobusezuko.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b696ebdf84---powatexirekuruze.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/qvnfg7af3h3pqbnf5n4bvvth25/posiwinazote.pdf
    • http://peaceinsrilanka.lk/userfiles/file/kaguzifi.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099e0e4bcb58---damasutupofiza.pdf
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/80112734618.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084379396da7---subimovegubela.pdf
    • https://bem-sa.com/img/file/vajaxewarawujirefev.pdf
    • https://baohohoanglong.com/userfiles/file/558094137.pdf
    • http://tks-forever.com/upload/2021/06/17/file/56310844083.pdf
    • http://myshopekerala.com/userfiles/file/9162860615.pdf
    • http://0930actress.com/files/files/jasedowow.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/uqnfemqodcj5s92hekhjogg6e6/kodega.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae0.bin
6a3f52be3422a46a3d488f704aed6201fa33535d367faa1f1683f4f2897c07f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 17016 bytes
font_01_sfnt_off00011749.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11749 16792 bytes
font_02_sfnt_off00012f60.bin
a27c00457f6f7b3f88ea5c2a9c615f2b3a1de8dd2e19b863cbf99bcfc43232d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F60 10980 bytes

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