Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c2d72643f9da59…

MALICIOUS

PDF

37.1 KB Created: 2020-10-03 22:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 1adfef2bf294d84c6981fe6930121f2d SHA-1: db0991564723850c2ec24d460950ab8eff7c03d7 SHA-256: e7c2d72643f9da597c6f0161d798438b6f6fd4bfd5db624baa36ca795c7ff88e
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/strik?keyword=differential+equations+with+boundary-value+problems+7th+edition+solutions+manual In PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/rerijorolizakal.pdfIn PDF document text
    • https://site-1041288.mozfiles.com/files/1041288/83201239851.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/46813713181.pdfIn PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/gewaxenefiwosumax.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/40760123100.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/7314211564.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/dujamilirinof.pdfIn PDF document text
    • https://site-1039787.mozfiles.com/files/1039787/wikuxikanidakebu.pdfIn PDF document text
    • https://site-1039765.mozfiles.com/files/1039765/bijupidevotejufavazoxifex.pdfIn PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/nibawanubobizifa.pdfIn PDF document text
    • https://site-1041289.mozfiles.com/files/1041289/73670784507.pdfIn PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/30391907677.pdfIn PDF document text
    • http://files.westboroughmassage.com/uploads/1/3/0/9/130969776/8078183.pdfIn PDF document text
    • http://kamopew.psychodrama-sociometry.com/uploads/1/3/2/8/132814170/4935735.pdfIn PDF document text
    • http://guleji.leazahbehrens.com/uploads/1/3/0/8/130874277/fobobojerut.pdfIn PDF document text
    • http://jojevul.clanchildhealth.org/uploads/1/3/1/4/131438563/putuxexiwone.pdfIn PDF document text
    • http://files.lisabloxsom.com/uploads/1/3/1/8/131856394/8206647.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00004fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDB 5912 bytes
SHA-256: 7fea2a96ae78521465f6be2df5fccd6071c7faf1e8e517f9ba6537b114a35b61
font_01_sfnt_off000063f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F6 10340 bytes
SHA-256: c2461d28d2a6912e43aa9a5d6fbcb30e90f2e653b8c116e9f1444a5c948d6f95

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