Malicious PDF — malware analysis report

Static analysis result for SHA-256 532347ab0d0c3944…

MALICIOUS

PDF

88.5 KB Created: 2021-08-14 04:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6756734314e1a04280671b115cdfc376 SHA-1: cb5165c3ae6c8bc28e85dac532f2d889c2b89e67 SHA-256: 532347ab0d0c3944ab5c1610909a3249642b2011e3b408c96a223a762c857eb8
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of 'javascript+object+oriented+programming+pdf+download' in one URL suggests a lure to trick users into downloading the malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://alfavit.tv/userfiles/file/neriroxijajuba.pdf In PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/s2i9a5jttdg3qdudf5qd9112m3/7007484345.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d193098415c---fujejoganotozo.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/fb652f5fa517a856a093e6497b3cd1fd/dopunabatowunipev.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/vonusu.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b29ac890ca---72824053917.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8bce47b0e---josuxojuxupekamu.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/vamufa.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/756777cf9a427e041dd8de6e3e5db0da/34595521624.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/38bff57ceff7233cfafc071c92a99ff3/dawozuveno.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/60157837086.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/6816343eec19fde94e5433a0fe483e6b/47469831260.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/j6pgjhvlthh1brh8tubjgob3k3/75685538264.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/700afd5ce5cb0e36b1fd8af42a450f6b/gufab.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/53240464803.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7c44d9e63---zeputovaximexulakafeke.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/612j6m29mu0j9o8ggicd21kat9/zagutisonenelukuvuvoz.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/46933654757.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/josenetudovobubitakonip.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/pavakoraxupe.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/dexekixoweberavuzeg.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/wukuvuzom.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/netugunuvidujoxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=javascript+object+oriented+programming+pdf+downloadPDF 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_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB4 11376 bytes
SHA-256: 7ccb8aada5e0a6722f6b0edc82077f82f071d469334528c27cc734fab57025e6
font_02_sfnt_off00012513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 17684 bytes
SHA-256: 65dd57d4811fe717feabc8262d3fc2767248bc24dc6cc5e936906dbca080de54

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