Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d6804a1f2376b1…

MALICIOUS

PDF

81.2 KB Created: 2021-04-07 17:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 61f7b5ba36b99a59e42a474b6cf7d83a SHA-1: 2db7f72658043be10876c6db53f0dad43b345369 SHA-256: b0d6804a1f2376b11a5f7f4eeb5759322b729db55d61871d2bf6fa2f6b1d3629
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://crophysi.ru/strik?utm_term=what+is+the+message+of+young+goodman+brown'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the PDF is designed to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=what+is+the+message+of+young+goodman+brown In PDF document text
    • https://cdn.sqhk.co/bupedamarib/ghcgfr9/duluzixonejomibexigusez.pdfIn PDF document text
    • http://pycnidwzxc.info/86258358456k35ji.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/jjgcjiX/bluestacks_hd_app_player.pdfIn PDF document text
    • http://iqecoportal.ru/gingerbread_man_coloring_page_templatehz79n.pdfIn PDF document text
    • http://cosmosqrab.online/brave_frontier_mod_apk_terbarua9bfn.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/ZFbiiU5/sosagepekugexexuzavogupa.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/iejjjei/dc_bike_ride_2019_photos.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/iHgihgF/begedufifafa.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/shjhcja/79095726939.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/wunemuruk/hVStCdf/55415025640.pdfIn PDF document text
    • https://cdn.sqhk.co/bozadukopufu/3QVsEib/60949166545.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/uservoice_azure_information_protection.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/interview_tips_answers_weaknesses.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/xuxexu.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/tricep_pushdown_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/nadenawinikusofasalowos.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/35959387227.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/36903898301.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/egyptian_cotton_sheets_discount.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/99427762013.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/96020167371.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_off0000fd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD55 5636 bytes
SHA-256: cbb39d4574cbd4c0136cd9b54a61dc4e683cd0efacb16b203cb56818f135e76c
font_01_sfnt_off00011072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11072 10916 bytes
SHA-256: 65567928de7160d1f0e0250776975a6d2102a0a97861f5535d12d4f77ea720c8

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