Malicious PDF — malware analysis report

Static analysis result for SHA-256 58010027a3d0f3a4…

MALICIOUS

PDF

79.6 KB Created: 2021-02-26 13:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 415e171ba5d8b1009127d0ef6d4d3c00 SHA-1: 2ee48973493ac13c14b6257102e488ddfc2eb053 SHA-256: 58010027a3d0f3a44d1d23062416e330337fdcff4115dbfa557f392c95f7ba90
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one that appears to be a redirector with a search query. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further compromise.

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 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://ponafet.ru/strik?utm_term=white+christmas+song+list PDF link annotation
    • http://sufulilutidake.mypressonline.com/sideline_out_of_bounds_plays_vs_2-3_zone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496582/normal_5fe149c0e6d63.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/vowug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5fdb114d7b6bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_60333b8536b27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405687/normal_5fca4f8617d83.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/7555577431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_6000c2ad6629f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_6013c3d848b43.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/17995945595.pdfIn PDF document text
    • http://beamorem.com/97467356269uvzmf.pdfIn PDF document text
    • http://specialsale.info/602639647672ujpu.pdfIn PDF document text
    • http://optarfes.com/surface_area_and_volume_of_a_triangular_prism_worksheetsvltp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_60258033ec229.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/autocad_2d_furniture_blocks_library_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452381/normal_6026e5b6bf24a.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/bidemewufa/422861117.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/kudipiz.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/7654218288.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
    • 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_off0000e699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE699 5228 bytes
SHA-256: fd1cee75154ee860755ed4b0a58a67e30e27190af0ccf591cfef2aac0d78f3d1
font_01_sfnt_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 10320 bytes
SHA-256: d83c6b9296d88c71eea12dacab4d838e1b272be1330b21480ddd2662f344ce1c
font_02_sfnt_off00011b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B98 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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