Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7579403576b4ca7…

MALICIOUS

PDF

74.4 KB Created: 2021-04-14 14:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f212eff882826102ab80d4c9ea2c46fb SHA-1: 972bc3bc78f120d387d5a13e52ccd1320b72d3cb SHA-256: d7579403576b4ca749bcd84451c8815c623e7ee31f7bac0745f14f0647046040
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/strik?utm_term=climate+zone+between+tropic+of+cancer+and+capricorn PDF link annotation
    • http://dorulezebum.sportsontheweb.net/bsc_chemistry_honours_syllabus.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/new_real_book_volume_2.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/nieYhhd/the_maxx_comic_book_1_value.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/bYaijji/petarozatowasunam.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/libro_dieta_anticancer.pdfIn PDF document text
    • http://zuxemesemubozo.mywebcommunity.org/41116423418.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/hbc5iim/65461034783.pdfIn PDF document text
    • https://rovetizewi.weebly.com/uploads/1/3/0/7/130776299/fediveb.pdfIn PDF document text
    • https://xegabazoku.weebly.com/uploads/1/3/4/3/134318522/5822217.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/wetamenimomi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jipowumat/ahlfors_complex_analysis_solutions_chapter_5.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/free_templates_after_effects_cs6.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/28386838456.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/87888972528.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/xamezeked.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/fofis.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/world_religions_map_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/37220035428.pdfIn PDF document text
    • http://voturugivorajop.onlinewebshop.net/47229316756.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE615 5312 bytes
SHA-256: e54b246efa2108d40883c05f66513ba37f034f9a42145ab0967ac1b2dcea1fe8
font_01_sfnt_off0000f81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 10804 bytes
SHA-256: 61f7403ca1d691152d69fbf61f96a8c4ce38e31adc1eae1afd6a6efd2f6c9edf

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