Malicious PDF — malware analysis report

Static analysis result for SHA-256 b576e7d482ab6d38…

MALICIOUS

PDF

40.4 KB Created: 2020-10-01 10:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5e842dc8ebb3e4c979f63b76cb66537c SHA-1: 6a6f962579cfa8763ef116069b3bd0d07512b4e3 SHA-256: b576e7d482ab6d388e18b55ed7edab9b6842fe38a8af0defac9796d9dd4ce0d0
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=bhagavad+gita+pdf+kannada+download In PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/61645260163.pdfIn PDF document text
    • https://site-1036649.mozfiles.com/files/1036649/64672377476.pdfIn PDF document text
    • https://site-1037054.mozfiles.com/files/1037054/vonilafojexos.pdfIn PDF document text
    • https://site-1036861.mozfiles.com/files/1036861/sezotuduwukuwiniwum.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/sejejukarefifemesev.pdfIn PDF document text
    • http://xipevu.burnsidecenter.com/uploads/1/3/0/9/130969352/f2f548db5cba9.pdfIn PDF document text
    • http://nalexar.weinclusive.com.au/uploads/1/3/1/4/131436978/3843662.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca73616b-d95d-465d-8193-defdbf1ea533/1117436015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af3e164-3422-4014-aa7b-52daceb0d001/noxamexidelesozajajatox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8518cc0-e30c-4c05-8fe6-ba0212a3b2fd/vaxifojevus.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_off00004f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F92 5296 bytes
SHA-256: df5fb94979414d7746e15335295a4077d499e06e000189e956e3498ccb9c437a
font_01_sfnt_off000061b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B7 4932 bytes
SHA-256: 9553621a6c93434c4d6a894996fbc024e6a7d92f37e5cd5669f94683fe2777b7
font_02_sfnt_off000072d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D3 9956 bytes
SHA-256: b64fbb6d6e939b48df365a537c7b46923605a8e1160943657efc78c75d8e86fb