Malicious PDF — malware analysis report

Static analysis result for SHA-256 8baa70cd4ec04723…

MALICIOUS

PDF

91.7 KB Created: 2021-09-02 22:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 964f387a2ec864dc6142e76497a14311 SHA-1: a543d5a31088a45e12d9b7e22c4de999728447b7 SHA-256: 8baa70cd4ec047232c204750d66a49d292906387471966714deb7e4d7913e63f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier. It contains numerous URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to host or distribute malicious content. The presence of 'utm_term_redirector=True' further indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b805b0131e4---10500755888.pdf In PDF document text
    • http://axiomestates.com/userfiles/file/pexixedevobedokib.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/ronopowul.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16109c0da3e1ec---76338665931.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/46768943607.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/12221d3b4242e518358e84b829beb40e/boxopirikofuw.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/mijajupasegejorerenaf.pdfIn PDF document text
    • http://clingac.es/d/files/bepugabofofatebisafe.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/ladudet.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/wemimawugesomub.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092d07aaffdb---kusatuf.pdfIn PDF document text
    • http://springbook.no/files/46221695425.pdfIn PDF document text
    • http://abpaluso.com/upload/file/virunos.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/9732d08fe8bab9b0668bf4b6fc5191fd/11747477137.pdfIn PDF document text
    • http://voijin.com/userfiles/files/88663238957.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862fedc02d1---galupad.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/virewopi.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc5ea681e1---676398989.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/2d587b824d8cdfecc0aec8bd7c1bed0c/9859836883.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/72013282337.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/83860818789.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f87c5d8594---dopilukifisobudu.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f371df1ab---fozuzetisufazo.pdfIn PDF document text
    • http://retailcop.ca/files/86304726440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=microsoft+powerpoint+tutorial+point+pdfPDF link annotation
    • 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_off0000fff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF3 17896 bytes
SHA-256: f47fc78cb31c3c145743da41644fc15591a8367c990eb1506aa319b9415d18a5
font_01_sfnt_off00012e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001464d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464D 10792 bytes
SHA-256: 1eaa32e6eff2c94ae31a2c9d79de66abc61e5f4ea937d78d4b65e7f2f312610f

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