Malicious PDF — malware analysis report

Static analysis result for SHA-256 f536eb657669326a…

MALICIOUS

PDF

70.1 KB Created: 2021-02-23 01:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fb3b17f1f5be0467de40e96690899bab SHA-1: 85b60c90eccfc213a54134cb4f2b49ee1a2cf4c3 SHA-256: f536eb657669326a1f0b21943e1f1827b7d3754e077a92ea9fcea41a7b2af0d2
184 Risk Score

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://crophysi.ru/wix?keyword=simple+gear+train+with+idler+definition In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476302/normal_602e311e7efd2.pdfIn PDF document text
    • https://cdn.sqhk.co/dexasubu/5jPCig7/jopizaguv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412591/normal_5ff2096a5c512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fd5fbaf13aad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5fe38bd5d5225.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/fhaGC8c/planet_fitness_personal_trainer_application.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/cB4ijjb/exothermic_graph_name.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/Y3Aiijd/todojobogorapazugox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_601366076f820.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gujugune.rf.gd/vebimaji.pdfIn PDF document text
    • http://favigagiwu.epizy.com/introduction_letter_for_cv_template.pdfIn PDF document text
    • http://rerezedosal.rf.gd/apc_smart_ups_1000va_datasheet.pdfIn PDF document text
    • http://valogaberel.rf.gd/rasotelezubeki.pdfIn PDF document text
    • http://rasijubesu.epizy.com/24868152976.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDD 5260 bytes
SHA-256: 215a9fa7d7ee4e04cf4bb5c5f2e32b39bd3fb10dd3709be30769d00f266c7cb8
font_01_sfnt_off0000dd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 9320 bytes
SHA-256: e5b85e2d581161b956e9e074c64ba29bb27767bb2e309513b0464ed89c5e2e5f
font_02_sfnt_off0000fd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD91 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361