Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ea6cce2a8e852a…

MALICIOUS

PDF

93.9 KB Created: 2021-09-03 00:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3ca3992352d6df15d519ffe0f2bfe098 SHA-1: 97e65f03313053520a792fc5a076346df020fd70 SHA-256: 49ea6cce2a8e852a8c1dcf2a67086f98d43e79cc6c46aed466dcdce41acb3a45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://smidgel.ru/uplcv?utm_term=yakima+trunk+bike+rack+manual PDF link annotation
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/c43df000a8e8a9c2fb8765d4197cb776/41647200456.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078de97640dc---wesokitifulelotodap.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b36d601bd67---turixarokora.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/vizibepebekodafik.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/8h2ug85n5l9msrmel18pk4urtr/soranise.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/numatakudusofelarili.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/afe8b18af2bb9cca88229e5258752d79/bukuwozatamud.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/fepawi.pdfIn PDF document text
    • http://4darchitecture.org/img/all/palineno.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5dbf06f35---xumepiturulej.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/20326249606.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/74f25f0738bec1acefa08866206b58e1/77659173442.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/nidiwibo.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/n70jmgi2h410qj2f0uqd10vjjh/73628199486.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sexedezuwub.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/mujuzujiro.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jijurelad.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1853abf9ef---nakituvinuwipagixaza.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611fd18aa1861---43715914661.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/wuwijad.pdfIn PDF document text
    • https://stotex.rs/files/tuvenesonu.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/xedoxakazeweg.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_off00010c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12437 10416 bytes
SHA-256: 739973da2d45b608a6a404a485d38f7b08da55ecbdfa5cd5453dcd508bf04a92
font_02_sfnt_off00013bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC6 17684 bytes
SHA-256: 9b01e32d6448ea8c7e2bcc70a150da374b511433b84c9272912e094160c3e6b3

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