Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e707a06caa9672…

MALICIOUS

PDF

82.7 KB Created: 2021-09-12 17:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c04d71cbcb0ee5a60a0e2cdfbd482c0f SHA-1: dee71aa8d57beb8bb20bce48b63b806cf6efe3fe SHA-256: e2e707a06caa967211b1906ec9f7acdfc96fc27101aa7f867a7a31f687cc48fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to potentially compromised WordPress sites or disposable hosting. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious or phishing content, likely exploiting the user's trust in PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://drafthe.ru/uplcv?utm_term=real+cricket+20+play+store PDF link annotation
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bedcf66f33---80375010166.pdfIn PDF document text
    • http://expertworker.paraleumarian.ro/app/webroot/files/userfiles/files/52607665933.pdfIn PDF document text
    • http://thevalleytrader.com/files/supoje.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/18276841184.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/punukutapawawiwudiku.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/40526786065.pdfIn PDF document text
    • https://equimat-cheval.fr/file/96367009714.pdfIn PDF document text
    • https://wineart.online/userfiles/file/nujez.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/79605638228.pdfIn PDF document text
    • http://citranco.com/users/files/tajunatiwu.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090319333175.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/75070539941.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/jupobirejejufe.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/tukonufaziviri.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca7d9e22ad---88511423858.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/64353420987.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/xitiben.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613172218f2da---dojonovepepijasuzipapej.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/56763234190.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/53531846600.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/58628926741.pdfIn PDF document text
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/mudusiterepow.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210907205400.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16139da8b64d01---fowipa.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/98763314654.pdfIn PDF document text
    • http://demkapi.com/resimler/files/kabewoninulidujesusosaw.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/c5nfjasf4up21j11b5q79cbqm3/xoxalabefokizebawofofe.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/rebumitefubu.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_off0000de29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE29 17676 bytes
SHA-256: ab3e4df0a82f2237c81fd3f94c727be10ce68bdd6cba89ffe580b69f43101217
font_01_sfnt_off00010bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFA 10756 bytes
SHA-256: 6ca04ed34ddd201aef7690e305c6eb1dee6714c9d9cb7d7cd2b3b6fac0148b19
font_02_sfnt_off000124f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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