Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e41086877abd413…

MALICIOUS

PDF

72.0 KB Created: 2021-04-03 21:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: dda292441b81bd5c1a5e31e711758e52 SHA-1: c522ecac2d970b58858524c81555ee5354d69b04 SHA-256: 2e41086877abd4135769e280d2ed5fe92372bef605b6bf2ab80807e3c3c91d48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm designed to drive traffic to various websites. The embedded URLs, such as 'https://vilenefex.ru/wix?keyword=los+meses+en+espanol', are likely used for phishing or to distribute further malicious content. The ML_NYX_PDF_MALICIOUS and ClamAV detections confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/wix?keyword=los+meses+en+espanol PDF link annotation
    • https://turikiripejuz.weebly.com/uploads/1/3/4/5/134501804/9173583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_6010f80224fe0.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/FxekghA/online_art_master_s_degree_programs.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/cgcghjf/stickman_bowmasters_apk.pdfIn PDF document text
    • https://wuwenesugujiku.weebly.com/uploads/1/3/0/7/130739695/sigumakatewij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_60136426e9715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_6053aadfbcd20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490377/normal_5fd76b69e904a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_604dd2bfacb07.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/GjchitC/82983733579.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/7VkG6lk/idealo_online_shopping_product_price_comparison.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_e28b77cb8cb64575abc4991b409df8e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68f5268-55cc-461b-b450-b1885c5bf2db/how_to_connect_skullcandy_sesh_earbuds.pdfIn PDF document text
    • https://486a928f-df87-4682-b39c-9199637d78f9.filesusr.com/ugd/982a49_33dedeedddb7487b930b3a92ccce8be6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28926862-3203-45c3-9687-88bf018007a7/xedowijaxoxavabugela.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 4808 bytes
SHA-256: 156f1021ac106569bd52061c8b36af70f20d31c4ba771ec2342008c851de1364
font_01_sfnt_off0000eacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACD 12044 bytes
SHA-256: f42d2ce12597f6bd6cffcc05d84762018775975465d48481411c0646ddec949d

Open this report in the interactive analyzer, or submit your own file for analysis.