Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0bd39b5107c629b…

MALICIOUS

PDF

54.5 KB Created: 2020-10-04 07:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ecaa826fbfa3067154031dff6fd13a3b SHA-1: 268c5b732e8131fb7c0b52b8ada82103cb815ac7 SHA-256: e0bd39b5107c629ba5384ffd6261c2f4142cd45ada3fcedbf5aceff7f238bfaa
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links pointing to potentially malicious redirectors and disposable hosting. The document body, though heavily obfuscated, contains a URL that matches one of the identified malicious links, suggesting the document's primary purpose is to redirect users to external, malicious content. No scripts were extracted from this sample.

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=los+anunnaki+en+la+biblia+pdf In PDF document text
    • http://vixujuso.villatiferet.com/uploads/1/3/0/9/130969918/vuxobi.pdfIn PDF document text
    • http://lezabogew.trudygovier.com/uploads/1/3/2/6/132695240/b4726ca8.pdfIn PDF document text
    • http://files.woodstockvolleyball.com/uploads/1/3/1/6/131637691/tajis.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/venojoxogivugofirazawu.pdfIn PDF document text
    • https://site-1040426.mozfiles.com/files/1040426/13143280343.pdfIn PDF document text
    • https://site-1040094.mozfiles.com/files/1040094/6792449816.pdfIn PDF document text
    • https://site-1038360.mozfiles.com/files/1038360/safoz.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/35433666915.pdfIn PDF document text
    • https://site-1038720.mozfiles.com/files/1038720/29483025062.pdfIn PDF document text
    • https://site-1038705.mozfiles.com/files/1038705/fonixadurixeragezo.pdfIn PDF document text
    • https://site-1038963.mozfiles.com/files/1038963/22805513111.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/lezavom.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/34421276325.pdfIn PDF document text
    • https://site-1036632.mozfiles.com/files/1036632/61712513197.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_off0000940d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940D 5084 bytes
SHA-256: 09eb2fb30e0a3723fbff3800c028ecee171eb1950217cbf7feb22fa1a5fef868
font_01_sfnt_off0000a56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA56F 11692 bytes
SHA-256: b9f0d3464308952591f0b72dfb445494d25a24af68c9c1562ae454d18b44dadd

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