Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfdb6f4a8029829…

MALICIOUS

PDF

78.1 KB Created: 2021-03-26 08:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 324d521c4cda12600ea523917454284a SHA-1: 7f6548316a9830ff6a42fb6dfa92669827a9ca22 SHA-256: ebfdb6f4a80298294dfa15c50532893b75fdfc3a496e2766129a927950db974f
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=the+mole+a+measurement+of+matter+answers'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wix?keyword=the+mole+a+measurement+of+matter+answers
    • http://forovasax.medianewsonline.com/how_much_are_old_real_pearls_worth.pdf
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5fea43b7233a5.pdf
    • https://static.s123-cdn-static.com/uploads/4452161/normal_5fee70826c891.pdf
    • http://dewisazovuvoxi.mywebcommunity.org/35817256029.pdf
    • https://static.s123-cdn-static.com/uploads/4418556/normal_5fff5c6e7a5f9.pdf
    • https://cdn-cms.f-static.net/uploads/4413347/normal_602a2bc8b9ecf.pdf
    • https://cdn-cms.f-static.net/uploads/4413712/normal_601dad3498833.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aa5cfcdb-a8a2-43d4-b9fd-a59ca9e533ce/project_tracking_tools_jira.pdf
    • https://uploads.strikinglycdn.com/files/d85cd787-8153-44ed-b77f-0df7b766e42e/craftsman_electric_mower_manual.pdf
    • https://uploads.strikinglycdn.com/files/f10b526a-1874-4a34-8c4c-81670647d75a/19728760427.pdf
    • http://dowinoxerirud.epizy.com/bilalosaxetigojesafu.pdf
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_074ac10f6abf434b9b6293b546c41dd8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dc29d164-8e0f-4fa3-8ddf-7d390ceae23c/sowinomekijuvezumawire.pdf
    • http://tikikenuf.epizy.com/56681105141.pdf
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_50a8c4bdf80d46c097a0f59d5131e3f3.pdf?index=true
    • https://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_4da2b01a192443e192b5c0d5fadc0420.pdf?index=true
    • http://memonexato.epizy.com/70616688108.pdf
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_0720430ee669424da39d2c21d0680835.pdf?index=true
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_43cbc4a27c2e4e06b6518ca61d4283e9.pdf?index=true
    • http://budibisila.epizy.com/anxiety_disorder_free_download.pdf
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_7fb011a13ff248fa8764368f1bace64e.pdf?index=true
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_890bca5264a84f8194e7ca3b9493f030.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e6.bin
83e35e9792b138959189c30985f2487beb05cf4405b07b36fb824312c02f352a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E6 5048 bytes
font_01_sfnt_off000102f1.bin
761a05d6905ed1782175d53bd1d266ee7bbd5aa57172d5320ba44a643c4d7cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 11752 bytes

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