Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3ebf882f29573c…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 12:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9f0949ed7ea8cf127d57d3c5171e3a65 SHA-1: 8b617f7c828692a98c16f8249a1c065a323e95d3 SHA-256: 0e3ebf882f29573c6ed57e5904c0f849fdef7415933a93ab5569b41adee4ca2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pistant.ru/uplcv?utm_term=orthodox+and+recalcitrant+seeds+pdf PDF link annotation
    • http://ck-tct.ru/userfiles/file/29380495831.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/63776554957.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/696uee4fso8956gtr8u584nu74/wajuduvexizar.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/sg75uio0roc0mrnnasoau30pcg/8621013402.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161315f2943d03---pezumefemivaxire.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/buganolulilixuk.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/vewigedazabinuvugukepuxam.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/dokamavomuvojuxejilegig.pdfIn PDF document text
    • https://mavibusiness.it/file/6911646081.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/dixez.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1303aa02d1---tasudajodagejafowebawi.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc025ac503e---zomakesavisemeraro.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210620194136.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/subalafobiturewiwu.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/68436302324.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/hocnbdeir9ker8sigjvpom9k13/90909056415.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/27816873719.pdfIn PDF document text
    • https://projetovm.com/uploads/files/rupobemevagazigizi.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210722_C8E372C872E9E107.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608205c532675---89595804669.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/jarisegusogewirixo.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/1245389574.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/jeruwojugenorujaketux.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_off0000e5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF6 18172 bytes
SHA-256: bb2df87ef4e080981d458d4b91b22444e2ab86d5587109709090d71d8f63a126
font_02_sfnt_off00012ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE9 10844 bytes
SHA-256: de2a9061554a52e740c1d136ab0c06218b681d829bdf6dc17e92f52995c688ca