Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ce0ee27a67c34f…

MALICIOUS

PDF

71.1 KB Created: 2021-09-29 09:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 556834bc1f1cd70f94fa44d3b91deef5 SHA-1: 36995bf3fee1a00188c29821b017e386abaa1eaa SHA-256: b1ce0ee27a67c34fc8dee1836cce712ad57cd7366fa983a144ebd641589c62cd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous embedded URLs pointing to various domains, indicating a likely phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate effort to create a large number of links on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://catamma.ru/uplcv?utm_term=shadow+fight+lucky+patcher PDF link annotation
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/raxojolemenemukipekuj.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/12375745758.pdfIn PDF document text
    • http://wpchkg.com/upload/image/file/33297616545.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/82271415249.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410fa14c688---bevidej.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/32764080420.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/14111113904.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/juvonijamifovilixiza.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/24574254500.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/tanubosenedodafawega.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/tivunuxip.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/86989233465.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/67034939634.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/tirizopagefepesiluro.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/70299027592.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/27297255707.pdfIn PDF document text
    • http://ydchem.cn/filespath/files/20210925071821.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/79413822791.pdfIn PDF document text
    • https://ibextrail.com/editor-images/53297831813.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/jomemuxuxamolefopelejer.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/gekugavisisakuwilubidefa.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/xodugebajek.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/vatunatakupagesi.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_off0000b2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A7 11096 bytes
SHA-256: 3deff65a61416725b0fae98bf462ae59ab69f960b648a1c42a16059b951a6f89
font_01_sfnt_off0000cc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8F 16548 bytes
SHA-256: 9a6be5ba9119a11b913861b89d0d322b75fd86e444767550b0f217a4a48a69a3
font_02_sfnt_off0000f6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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