Malicious PDF — malware analysis report

Static analysis result for SHA-256 5202fb35abec652e…

MALICIOUS

PDF

85.9 KB Created: 2021-09-09 12:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 3e4851fb09f8141c63634950c1a8c7ee SHA-1: 66130c8eefdee63082e4d364e5d353b9afd300a8 SHA-256: 5202fb35abec652effb536e9218d519992c790893322f7fdff17b826bd5dda0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that function as a link farm, directing users to external sites. Several of these URLs point to compromised WordPress installations, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=mutants+and+masterminds+ultimate+power+pdf PDF link annotation
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/95f2dd7eff35fada5e95a3a2c9f51154/tozolajogimep.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/10241396001.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/vibapu.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kafuwumugeforoge.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/56199936786.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613076d79de16---91870145185.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137d1a92f2aa---80765283168.pdfIn PDF document text
    • https://promise-land.com/upload/file/11806902245.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/vixoguwolawikagajik.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/xoperoguxiva.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/lipawuxadam.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/74615047450.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/27010489503.pdfIn PDF document text
    • https://suacuachuyennghiep.com/uploads/files/golomelitatuk.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/41615898700.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/16276456301.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/18961479817.pdfIn PDF document text
    • http://escalierdurire.fr/ckfinder/userfiles/files/sowusugaxubira.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/76914811363.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/dedubepikojosakogovorefe.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/nelijafadibal.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/kikasowavebodilifupafafuw.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/56515504230.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/46136040995.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/40371130262.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_off0000ead9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD9 10840 bytes
SHA-256: 64661f022f99a943cf0030917ef0288ab820939856251d87815843ef2df33141
font_01_sfnt_off000103dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEF 17508 bytes
SHA-256: 798aaa8b8d8236c27803c09470938aa28cac4358c57670d2b8cde93ef9acbb5e

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