Malicious PDF — malware analysis report

Static analysis result for SHA-256 5367004d150cd330…

MALICIOUS

PDF

81.6 KB Created: 2021-08-15 15:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 95fdf35e10fba2e44502aa87daa7ed29 SHA-1: db5a69c363586097d6701ba5bffc8174829be4b3 SHA-256: 5367004d150cd330440e3f38b0de3d1f301d89ba6588f56025d1ce290264291d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://huntic.ru/uplcv?utm_term=multiton+pallet+jack+repair+manual PDF link annotation
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca37618d1---15068985221.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/5ulkj5m0u3epv6tlrth9f7sdcd/xajefumuruninojetis.pdfIn PDF document text
    • http://apsons.eu/files/file/84938004847.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/zinepubikive.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/qu7kj4qak14j8ilpbrk0fn0bsd/reduperinuxovabeduxir.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab776b7c980---58759915591.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/rebedokemoravurin.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/52cf78d9be98b13aff07383e88935bf9/10922337393.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/26402574446.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/28a26d3a05048a83f5a092d8ea076ade/47265125583.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/rurugovipebebipowosikexa.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/witobibatabogedogazo.pdfIn PDF document text
    • https://wagaskar.com/media/fesenoda.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/98130064405.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2546b74d9d---6676215477.pdfIn PDF document text
    • https://fishuntpesca.it/file/46714456752.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779450dddf3---21810816969.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/derufaxeki.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607450bdcdad7---4289062909.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/23131877850.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/6hbu9c0rgfb970cm6h7vhb1jrm/tovan.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/525b007aaa004b3e16d8432779503a43/43364578982.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_off0000de15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE15 16300 bytes
SHA-256: 6d3dc250085edb5bef0f7b80f80f356baa03981fd4b8350411510e59db4d89e8
font_01_sfnt_off00010841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 10680 bytes
SHA-256: ea51717e22a3f40b1608549fff8f3577268ae45552f1c204e204502add2fc3ea
font_02_sfnt_off000120b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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