Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab6ed04fc354b01…

MALICIOUS

PDF

79.8 KB Created: 2021-10-30 05:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ff4032ca8c80db9721f8d256f882b0ef SHA-1: 356be4873fdbc3b6e4a37f19381d4501a9babef7 SHA-256: 0ab6ed04fc354b011d00f14020d3901366f31c1f7dd3c32df7c42d3f51f9a5ee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The document also features a link farm pointing to various external websites, some of which are hosted on compromised WordPress sites, suggesting a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tainandentist.com/uploads/files/202109120251564477.pdf In PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/56411012748.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/pevaxakodegolejebe.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/moxavilas.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/49065477915.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/sotijiku.pdfIn PDF document text
    • https://highrise.pl/file/xuginag.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/76799670375.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/26642305445.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/kususebolof.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/sosogowigavarepi.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/66978515623.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/jixagowijawofopig.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/50310243247.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/mejabixulironoxozuviwife.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b6015012c5---87725575370.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/mibuminuge.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/4622930295.pdfIn PDF document text
    • http://soles2walk.cz/data/file/49809089202.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/lonuletapifizopapes.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/nojulew.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/mapanilitewazenobelal.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/mefewipobokenowinidukixin.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb7e783874---69881840341.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/BGAemAmcdTc/uplcv?utm_term=how+to+take+ink+alarm+off+clothesPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b2ff16f3f5---tegexetufawovozew.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_off0000d779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD779 10772 bytes
SHA-256: bea202c59dedbb8f393f0836d8b3cc07db1eafb92f895328bb8a2a9150a984bb
font_01_sfnt_off0000f015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF015 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10827 16228 bytes
SHA-256: 830955ae18d86c06aca7e718887129f5ae9b6e737b73466b9672cf40c53f90f5

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