Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea92e2b7a883b4e2…

MALICIOUS

PDF

86.0 KB Created: 2021-06-29 07:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 355ccd1395aa13c51cb2eb49553df21b SHA-1: 129af10b412ad3ea1ed9e2e072fb3e11ea595d56 SHA-256: ea92e2b7a883b4e2cdb018573f3efd9bfa6913ef721dcf9100bd93dd5ecf2ab8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple domains, including compromised WordPress uploads and potentially disposable hosting, suggesting a phishing or malware distribution attempt. The presence of numerous external URIs and a link farm structure indicates the primary goal is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/4ae0b113c2a95009e54263639c79d2f6/18571588365.pdf In PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/96qdhc5i4akdaoknt5himsobhh/72477415180.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/jupixopivitagozite.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/jarewamomobodat.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5229e2fd84---90716255301.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bd55185c5af---jigetofeviva.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/81371072539.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jklpt0hnhei16pedom47jhm1v7/94814916960.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/valagemo.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/busomalimotin.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/sai41cfnhssmnrshn3s78qtlj5/27229990277.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/45576164889.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a631d246169---tejonumejewapomulotuwo.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ad9ed8988---62401098058.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160743d9be17ca---3778371367.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/7e51c30603bfb063bc52baf9efb1cc29/65869047505.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076b18cd0236---78422414145.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/zesejeluseruju.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210614_063648.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb10cc8ef1---loketewofafekalad.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087bf246ce1c---leporala.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/84018391607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=can+u+put+a+paper+plate+in+the+microwavePDF 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_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B5 17188 bytes
SHA-256: 6a21ba23548b930ff823caa93c74003e83dc7ae73947da09909ccf1d3c066955
font_02_sfnt_off0001304d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304D 10756 bytes
SHA-256: d6aac6dc822897d147613bec552dd9015855c25bace6a880743616aaa38acb2d

Open this report in the interactive analyzer, or submit your own file for analysis.