Malicious PDF — malware analysis report

Static analysis result for SHA-256 e225d7a32e925b57…

MALICIOUS

PDF

89.2 KB Created: 2021-07-23 10:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1c62320709529fc624ec4dbbd1a95fbc SHA-1: e285faaaad030da06fa57e4b6745c31617135179 SHA-256: e225d7a32e925b57635bd6a7d8526de03be9901c5607d2707696c4fe34ac2f7c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. These links are likely intended to redirect users to phishing pages or other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ab62978d6---rudimivikokumuxabesoke.pdf In PDF document text
    • http://aarogyamedico.com/userfiles/file/96956040746.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/nedesubiz.pdfIn PDF document text
    • http://markone-tools.com/upload/files/47366863011.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae8757ef9e.pdfIn PDF document text
    • http://zerosquareonline.com/file/wiwotigotazereki.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/peruvubamopejezaroxipix.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c5cc7665d---fapologimevi.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6779b8711---9121001248.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606effd8c9bd4---20980036763.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2624296d0e---rimagowonomuxidikiniluduf.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210602173538.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/gufijojiri.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210524215859.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/logajafavelulisugevewez.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/vanaxeluxa.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bc519b77f---50280228020.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a39e7a2b714---44471079068.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aac3b86d13b---75940212170.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210714_A6FE683E6364EBBA.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/uiqk3efqkbroi780sca9ckeb1v/45190390652.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb4ec53fd1---93175219641.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609188d5d942f---94037563169.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210624125133_lprze4.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/64425618588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=becoming+a+speech+and+language+therapistPDF 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_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 16736 bytes
SHA-256: 9f1c745fd3ae26059915c42863ea071260be9e7cbb0f83b00a592d845c688f24
font_01_sfnt_off0001243c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C53 11112 bytes
SHA-256: 2c0694dd150625da2ba764942748fe3e3d12e513d08944d29a498e640f1faaca

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