Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d288676b65e011c…

MALICIOUS

PDF

69.8 KB Created: 2021-09-24 12:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4f6e2d096d71971a455c4755727e9644 SHA-1: 9b0cfb5e7175837265d85a87902ce567b0fef537 SHA-256: 6d288676b65e011c71fd00bd23c5e24db71d84a94783bbde2318fc962aa9e932
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded JavaScript points to T1059.007, and the overall nature of the PDF suggests it was likely delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ilksolar.com/Images/Media/files/pazukerexagasobiro.pdf In PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/25380947164.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/ludafaxasebemotavitudu.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/59442525341.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210920150735-71417689812.pdfIn PDF document text
    • http://jcpingie.be/public/files/96368046054.pdfIn PDF document text
    • http://sabaparsian.com/ckeditor/files/files/78512190022.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/87289659771.pdfIn PDF document text
    • http://nfc.soo.jp/file/majusaxuv.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/19876898819.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161497f1f8585f---79841790353.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/a1a0a73d3a6764a6a41653117dfffa05/nipolexezurumud.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/40024953331.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/65899545281.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/sogake.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/vufifopafobiraxomefagez.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/kevofona.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/xapadibozuganoduvi.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210919143351.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/nagedigofunuxuvulot.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/89143918393.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/susavi.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/jugamelekisinagej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=fortnite+season+7+free+skinsPDF 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_off0000b16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB16E 10280 bytes
SHA-256: aa451fccc6084b624fdb4f16c615914100ebdf87846941d34f414452020ef69d
font_01_sfnt_off0000c8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C2 15916 bytes
SHA-256: 7ecf858875e6e6e94d17085c16dd6eb4d0f6fe954a6ac38f9491c6b5fceca2a6
font_02_sfnt_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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