Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b2450f5173584b…

MALICIOUS

PDF

75.9 KB Created: 2021-02-25 04:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 591d663a9885a8b46d9dad24194ba7a3 SHA-1: 5037ae9ea167ed2fa6cc014a68bd99dad3413d6c SHA-256: d6b2450f5173584b9aada6f2c9070a968e457bc754d82136f08bc26452f8cd4e
184 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the document's structure and embedded links suggest it is designed to redirect users to potentially harmful sites, likely for phishing or malware delivery.

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
  • 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.
  • 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.
  • 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/award?keyword=diablo+3+switch+2+player+one+console In PDF document text
    • https://refiraledekire.weebly.com/uploads/1/3/4/7/134715744/802b26431e639.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/1302049727794316.pdfIn PDF document text
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/gixisa.pdfIn PDF document text
    • http://bitipusefotas.66ghz.com/marketing_information_system_definition_by_philip_kotler.pdfIn PDF document text
    • http://usacreditcheck.info/32821133599e1dtm.pdfIn PDF document text
    • http://vodoroding.info/5481417032feg34.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/3bd57855cfabe55.pdfIn PDF document text
    • http://talakam.space/matilda_musical_script_freexjyz3.pdfIn PDF document text
    • http://xilegutopeza.22web.org/39767359652.pdfIn PDF document text
    • https://juwizezajofop.weebly.com/uploads/1/3/1/6/131637218/8357319.pdfIn PDF document text
    • https://rofovotojoroko.weebly.com/uploads/1/3/4/8/134878837/8046239.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/pasawe/97093832083.pdfIn PDF document text
    • http://zuwewabarabin.epizy.com/mcdougal_littell_geometry_2007_online_textbook.pdfIn PDF document text
    • http://botemexake.rf.gd/dexas.pdfIn PDF document text
    • http://xexotoj.epizy.com/how_to_use_excel_family_budget_template.pdfIn PDF document text
    • http://wunozoviwo.epizy.com/xajesowotugabezadati.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_off0000ea8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 5652 bytes
SHA-256: 1841290ee52c9b2f53d660f0374693fa62d9ebe2e30db426ab95af3e3d302233
font_01_sfnt_off0000fdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 10716 bytes
SHA-256: e55ab0eefa6109a9b219356daedf91e4a68dc6c07cd841588c6685b2329b7a1f

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