Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11936c55cda8c67…

MALICIOUS

PDF

86.0 KB Created: 2021-03-06 13:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 580bd1b6640c869d57d3f9032773d418 SHA-1: e5ac5a5aa950d52704ff1cf71fc89d14c1c0537c SHA-256: d11936c55cda8c67f2f77a61874e6d32aa2803b26339caab811a38f1d279e543
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, indicating a link farm or phishing attempt. The primary URL identified is 'https://seumenha.ru/wix?keyword=sgm+2.01+soundfont', which is likely part of the malicious campaign. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=sgm+2.01+soundfont
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/9357433.pdf
    • https://vakozumemarob.weebly.com/uploads/1/3/1/0/131070483/tofarerujiwurilu.pdf
    • http://ludshop.xyz/19473846560nu0w7.pdf
    • https://jorevubo.weebly.com/uploads/1/3/4/8/134869484/227692.pdf
    • http://usejus.pro/how_to_prepare_for_sales_interviewlom5a.pdf
    • http://dolijajoz.22web.org/colors_tv_serial_nagin.pdf
    • http://powerpoint4you.ru/fezesobakexeponeze0uh7a.pdf
    • https://jexepasevotapak.weebly.com/uploads/1/3/1/6/131606223/lanenewajej.pdf
    • http://d-youtube.com/chick_fil_a_8_nuggets_nutrition_facts8x9qj.pdf
    • http://parhelifrl.space/hunter_thermostat_44860_wiring_diagramdol0f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/013bcaf7-9dee-4dc2-b0b4-687e50477343/93714487334.pdf
    • https://uploads.strikinglycdn.com/files/c7accff7-a5bc-4cba-bdbf-cafd462738f7/97797881269.pdf
    • https://uploads.strikinglycdn.com/files/d45a6895-0349-47a4-ba4a-403bc60d992f/viwopuwugexugamepenus.pdf
    • https://uploads.strikinglycdn.com/files/d61b2d4d-177f-46db-bd42-4f5ce0c58a62/74187340710.pdf
    • https://uploads.strikinglycdn.com/files/eccc6544-24f5-4752-947c-fef7e8741cb4/72297302543.pdf
    • http://gadoxijumulop.epizy.com/55047355480.pdf
    • https://uploads.strikinglycdn.com/files/8403afb1-f64e-4322-aa74-024ee777a08e/53259507961.pdf
    • https://uploads.strikinglycdn.com/files/da211d39-3f57-4624-8c85-4a607dd9336f/the_chronicles_of_narnia_prince_caspian_full_movie_netflix.pdf
    • http://pixutixiziv.epizy.com/vamudol.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe95.bin
e2d5a2ba668a0f68666c8d1434067f9311670ece7525eb249b2018a0c2e95d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 5068 bytes
font_01_sfnt_off00010fbf.bin
53e61d0672fd5316da40bb77523254a423d136ca4b6fc52a9acbdb74410f347e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBF 14520 bytes
font_02_sfnt_off00013ca8.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA8 4324 bytes

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