Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65f5e2e32685840…

MALICIOUS

PDF

93.2 KB Created: 2021-07-01 18:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5047100196fc6f62ef1623ed43f1917c SHA-1: 58398fe1a32add8628ac1995e780b79926649ef3 SHA-256: d65f5e2e3268584046f65f32bea6eb022074fe7f831b09d00cd628de050400c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and other disposable hosting. The primary goal appears to be directing users to external resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://catamma.ru/uplcv?utm_term=january+to+june+current+affairs+2020+pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/4fa54f19kl4d5vr8ncn1sgc4fl/15408524765.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ae31a717e73281da08dcd25a0f6e9023/mikonisijuvozoxufegejal.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/83905825153.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ec32d0f01---dikiwulinixejisokobol.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb60f26804---3873820019.pdf
    • http://cnc-soustruzeni.cz/files/file/25861648309.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/c8722ba1b7743f986c2b7ca704246152/43654937265.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a022a9d06f8---viwelib.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ca3435a12---linutabazig.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/2vaocp95g3cq541mhg6udhsiu0/33543637115.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0abba519a---jamivagalufovuzodokorola.pdf
    • http://kayapaliinsaat.net/file/26171513721.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/49461767003.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/h0nvlj0cmqopaslu9mi1dgeuas/xozomefaje.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/85460a7e43fb54d5e18089c67b8df3bb/lumawajavepukipidusodono.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a36c2a8f5bb---duxumenujex.pdf
    • http://ahlhy.com/uploads/file/021353437834.pdf
    • http://timandlor.com/userfiles/file/zotujesolapov.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/po44per508p7e435nd4rjvd8f1/budazovirobud.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098eb1116bf1---68995763517.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a7go7fshstb407h1enq4lsmpj2/24079422809.pdf
    • http://weberstellen.ch/userfiles/file/remaxozoluxirozude.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f485bc21d---razuravi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106a1.bin
e0eb007573d32e27fa75dfa8334dceb7828ea43e7368dd1fc43f592ad673422e
pdf-font-stream PDF embedded font (sfnt) at offset 0x106A1 17644 bytes
font_01_sfnt_off00013550.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13550 16792 bytes
font_02_sfnt_off00014d67.bin
bf2e27533cf6ec76471e655cb7f26b515f5d9a491ae45fb27a3f0d6df8caa5c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D67 11144 bytes