Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c258b64523d9de9…

MALICIOUS

PDF

44.2 KB Created: 2020-11-09 14:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 97662958d507ed4b205c8aab9f54e564 SHA-1: 97d975a0d675dc0308d61d357884311259fc75e6 SHA-256: 7c258b64523d9de9fc5def825de675fda60179d753631442bff321a7df7ff2c2
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 1.0000

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://trafffi.ru/123?keyword=information+processing+cycle PDF link annotation
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/kufupobofow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f8d9f929e068.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5fa65d3a3675d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_5f9f071f853fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_5f9da857048d6.pdfIn PDF document text
    • https://pesirirovozag.weebly.com/uploads/1/3/4/3/134316115/razenojetibu_wavajenetomi_mawutuwefo.pdfIn PDF document text
    • https://zazusixalug.weebly.com/uploads/1/3/4/4/134491239/sefanaxu_gedulerun_ruzux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422640/normal_5f972219e7239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5f8dfa6b8e547.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://s3.amazonaws.com/vovopafubipu/69883668284.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/23056161619.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_off000060a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A7 5164 bytes
SHA-256: 039e898957e22b27bfeaad2cf14b1351eee19323e81b0686214d1dc9ddcd1ae6
font_01_sfnt_off0000721b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721B 10536 bytes
SHA-256: 41c58585defb685910fc822be60f48190f61b09db5a4dbf6c7d4ea9822c803fa
font_02_sfnt_off00009637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9637 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2