Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7e5bcbd3ec7147…

MALICIOUS

PDF

71.0 KB Created: 2021-09-06 17:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fb428e0e9b22f65f15aa4d2b239358b2 SHA-1: a2687d23ff60b7d35f5c17f3e3876c58d56ec729 SHA-256: ca7e5bcbd3ec7147e38aad622df9182c717a116722b2aabfbfa1271be6d357fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=banking+technology+magazine+pdf PDF link annotation
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/2d8640231b98f0d7e69dcb991049005c/47185179288.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/benakij.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/46124754598.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/wibunelutesanoje.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/37288986859.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/a38437917ff17822f6ec3f0ccad7fbb9/xapoxavemato.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160acbd5b9eb05---figunadolijopuv.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/2271c6068290d4a9dd23e0e0585ae2d7/vivopiresub.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/92117170973.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/27d38807bc57c6f55def9b17289fa0b9/pimixebezijijokonipadimul.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/45115484944.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/31928707743.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ee13e28beb9953f2e5febf5441be1a48/buvizokawi.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/mupepulolelilot.pdfIn PDF document text
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/74640446961.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/31856261733.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/19b3ccf08eadc1937383bec1368a9164/rerage.pdfIn PDF document text
    • http://etnorom.hu/pictures/372678345.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae012b2812d---76156783181.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/saweju.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/nebelefawerogebuzul.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xigujizogake.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606cab8f8b597---62706404439.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_off0000b2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CE 16780 bytes
SHA-256: 03c4d477243248e6f12d9d075ef4d5b07ce9de64f2dc79cc1311f6fec20b77f3
font_01_sfnt_off0000dcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF516 11120 bytes
SHA-256: 7ede6ed4474df9d556192275d2d675efb076379bf29c177b65849afb3cd421f1

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