Malicious PDF — malware analysis report

Static analysis result for SHA-256 22172fb08468c257…

MALICIOUS

PDF

53.8 KB Created: 2020-10-05 21:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b43cace709cf21ecb74a1eb71822ac6a SHA-1: fda5c16574795809532d9b4df9b0c7b3decc8861 SHA-256: 22172fb08468c257662081a2a5fab11568922a88fb2eababd9e9a48166631bdb
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://cctraff.ru/strik?keyword=descargar+adobe+animate+cc+2017+mega In PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/kidosu.pdfIn PDF document text
    • https://site-1037846.mozfiles.com/files/1037846/84664438454.pdfIn PDF document text
    • https://site-1040785.mozfiles.com/files/1040785/53082458384.pdfIn PDF document text
    • https://site-1039490.mozfiles.com/files/1039490/gagazubi.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/kenajemajegogulo.pdfIn PDF document text
    • https://site-1038707.mozfiles.com/files/1038707/67830290113.pdfIn PDF document text
    • https://site-1038796.mozfiles.com/files/1038796/41758982157.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/furuk.pdfIn PDF document text
    • https://site-1039488.mozfiles.com/files/1039488/modetoba.pdfIn PDF document text
    • https://site-1041682.mozfiles.com/files/1041682/5498756263.pdfIn PDF document text
    • https://site-1040507.mozfiles.com/files/1040507/neganazetowugisefagodo.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/saretizavutowezumu.pdfIn PDF document text
    • http://xuwuto.legacycakery.com/uploads/1/3/2/7/132712572/384c37f19.pdfIn PDF document text
    • http://files.westcommunityconnect.com/uploads/1/3/0/7/130775632/2720228.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F65 4540 bytes
SHA-256: 5cc7675041826b05bce8de491ddb391902a29b542ea8a65450109a91facfd9d0
font_01_sfnt_off00008f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1F 5772 bytes
SHA-256: 2ce01a594285b6040a352466d4cbf8847f7e2496953c2debdeceafdd2817c9cc
font_02_sfnt_off0000a2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C0 11656 bytes
SHA-256: fb504bd9912f25ff43fb3403fa87250327585e5aca52c592e993f772b828c0b3

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