Malicious PDF — malware analysis report

Static analysis result for SHA-256 936e1c517bf5e14f…

MALICIOUS

PDF

49.5 KB Created: 2020-10-03 22:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9fd91f9958f10f2ec1600ed78d852e2c SHA-1: 7b9ac21947d2499c7aaed1a73e0fa3f3e2817c5d SHA-256: 936e1c517bf5e14fe8bad01690744b5721f74150cbba62c01f5a8ca42f40d606
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=children%2527+s+abc+songs+free In PDF document text
    • http://files.wigt.org/uploads/1/3/0/8/130814205/zagunujekexema-fepojanewadove-kowabud-gofurukuzeloge.pdfIn PDF document text
    • http://dofudaj.perrysplacellc.com/uploads/1/3/0/7/130775350/vivuk-gagomikifive-wironubuluw-zotonetufofajuf.pdfIn PDF document text
    • http://wijiveje.gearyguitarworks.com/uploads/1/3/1/3/131382531/votujijolafitu.pdfIn PDF document text
    • https://site-1038774.mozfiles.com/files/1038774/29043682209.pdfIn PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/xonaxap.pdfIn PDF document text
    • https://site-1040264.mozfiles.com/files/1040264/xutemaveluw.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/fizojiselas.pdfIn PDF document text
    • https://site-1038869.mozfiles.com/files/1038869/funazanor.pdfIn PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/nufenijip.pdfIn PDF document text
    • https://site-1038670.mozfiles.com/files/1038670/ropazovomofupebexodawek.pdfIn PDF document text
    • https://site-1039933.mozfiles.com/files/1039933/33894018153.pdfIn PDF document text
    • https://site-1038971.mozfiles.com/files/1038971/xixisepireloluxiziwoz.pdfIn PDF document text
    • https://site-1037843.mozfiles.com/files/1037843/puvifuwefadubanex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a5b446-6b2c-428e-8f92-c8766131d48d/bawisitoledibotuzu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009693.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9693 20140 bytes
SHA-256: d9e29bc4cf523d478df9ff7b0210629e0da4e065f56a13e78047f70988f7a634
font_00_sfnt_off000057ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AD 5364 bytes
SHA-256: da7c736258dcc290248a014809d9839b1139535789f25cec2eae9c2275f581c8
font_01_sfnt_off000069d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D8 2196 bytes
SHA-256: b44aa4805648dfc96ae1bdae3a6bca0b8c546022f28614c50b7ced6e11138faa
font_02_sfnt_off000073dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DC 10100 bytes
SHA-256: 351f3cb4531cfb769478ae8068d3204cc1d641acc511520362a0eaee06143d31

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