Malicious PDF — malware analysis report

Static analysis result for SHA-256 624dcc92fcb5409e…

MALICIOUS

PDF

41.3 KB Created: 2020-09-30 10:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3e768ee63b0faef430c4592efc5347ba SHA-1: a71931603bbe670fbe60fb48ea738b6437ce76aa SHA-256: 624dcc92fcb5409e602c93de633101b23135dbb73cbc17ab42f890c9fb19134d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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=plantas+endemicas+de+oaxaca+pdf In PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/79544736217.pdfIn PDF document text
    • http://sukezu.yeahonline.info/uploads/1/3/0/7/130775850/moxozaza_saboganufi.pdfIn PDF document text
    • http://files.mackaydoula.net/uploads/1/3/0/8/130814631/2946ad2c9d1d.pdfIn PDF document text
    • http://files.crwlodge.com/uploads/1/3/1/4/131453022/3006492.pdfIn PDF document text
    • http://wezeg.tajpalacelouisville.com/uploads/1/3/2/7/132740352/wijubus_tibekaze_gisajibukanig_wigositudedel.pdfIn PDF document text
    • http://vaxulozok.isdrc.net/uploads/1/3/1/3/131381533/jozitapubejoxuxosu.pdfIn PDF document text
    • https://site-1036945.mozfiles.com/files/1036945/227896608.pdfIn PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/judujaxodikog.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/ribikar.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/dulamasozugulof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/bevars_naa_songs_now.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8079/4522/files/70061886618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1141/3912/files/civilisation_6_ipad_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0999/0043/files/sovixokopapojigixidoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/74736322319.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_off00006018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6018 5272 bytes
SHA-256: 8ac52a2a132fe7a19dae7b2351dbf24ab18465645686fb93ad01f6e10e91cef7
font_01_sfnt_off00007200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 11220 bytes
SHA-256: a949e9cf3f8330e2259893edf5d11f6499b8d4ee4e067772cac12299505450d6

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