Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d90a818678b0a2…

MALICIOUS

PDF

37.2 KB Created: 2020-10-10 16:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c98a20ef2650c47826cae7e807e44876 SHA-1: bf2522ff3112d9158b1fdd86e4c7b7ec83ae926b SHA-256: 17d90a818678b0a2940bbf2b3332c7cc42dd3e445d540d418fd5b9a428eec439
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://ggtraff.ru/strik?keyword=nellcor+oximax+n+65 In PDF document text
    • https://site-1043445.mozfiles.com/files/1043445/ruteda.pdfIn PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/nuvowekanafipirejarebu.pdfIn PDF document text
    • https://site-1038915.mozfiles.com/files/1038915/92300119627.pdfIn PDF document text
    • https://site-1039544.mozfiles.com/files/1039544/jepegazafatuwewibasawor.pdfIn PDF document text
    • http://bifewupa.desertbeagle.com.au/uploads/1/3/1/0/131070588/wamodifuleter_wumon_zukura.pdfIn PDF document text
    • http://boruz.pianolessonsbyemily.com/uploads/1/3/0/7/130776757/495457f32f435f6.pdfIn PDF document text
    • http://files.wordsbyalexcyr.com/uploads/1/3/1/8/131856076/e34cb.pdfIn PDF document text
    • https://site-1039533.mozfiles.com/files/1039533/99520409469.pdfIn PDF document text
    • https://site-1037914.mozfiles.com/files/1037914/50048993589.pdfIn PDF document text
    • https://site-1039175.mozfiles.com/files/1039175/31166206118.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6d2f753b-f6c4-4938-8a67-2f0ac7b83244/bixasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a5abdc-5296-4b5f-b6ae-2256f0af3ade/86155526347.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_off00004700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4700 4788 bytes
SHA-256: 7e75328bef3f85845b2a281dcedf374f300bbb9af164de69f1215b0a7968f0a1
font_01_sfnt_off0000571e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571E 10528 bytes
SHA-256: 2db4a1b12073e142f8824852627bff22e3de7c86f0a495877def89724d1ff129
font_02_sfnt_off00007a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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