Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ca2286eb84c63e…

MALICIOUS

PDF

74.3 KB Created: 2021-09-17 03:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f9aa19e79cdfc48868aea50695b37c8d SHA-1: af0518597f995a562702a7ff6d00985a68d428c5 SHA-256: 53ca2286eb84c63e2b81c1997f3bbd54876cd23d50187078f6f1d416a508513a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links pointing to various domains, indicating a link farm or phishing lure. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=pc+game+that+can+be+play+in+android PDF link annotation
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/89120674625.pdfIn PDF document text
    • https://go2germany.ru/files/file/xefopifisejilek.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/sudaberubedo.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/nezisolurakupibulakajeme.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/jilobo.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/79976338713.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/59555649404.pdfIn PDF document text
    • http://timocomputer.cz/files/file/79123364135.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/70108366881.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/kuninebobulerilibapojiwu.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/31599388562.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/noxugunojexo.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161419f1aecb9c---gudeketobopesudu.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/hre96chvcutr14ca88s2l0dfm6/40278724814.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/98120326099.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/05/xagunesilunasekobatu.pdfIn PDF document text
    • http://manu-transport.com/documents/file/64838689217.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/48073174407.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/8726cfeaa674f7c67b3c5fdfc7865705.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/depukus.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/5263751731.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/sulopebunaxa.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_off0000bdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF6 17244 bytes
SHA-256: 34b06cd697dc3e613ce3200392dd1d35b471d8b523cdbed0eae2b9f203dcbfda
font_01_sfnt_off0000eaad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 11048 bytes
SHA-256: baa7a67f8ca7c42d912ea1706d634aa37fdfd8462b0e40dddc6bd112a22ee356

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