Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5e7b898cdd0c3d…

MALICIOUS

PDF

42.3 KB Created: 2020-10-02 15:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8ca3d541fc2c5a31c716bde290c00181 SHA-1: 52ada1291859033d494a65a4738907d005d40b6a SHA-256: 9a5e7b898cdd0c3dc25b3742a4015effb3a0d51be7c7623d836d4bdf872e1891
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://ttraff.link/pify?keyword=convergence+tests+flow+chart In PDF document text
    • http://jonomozew.morrispublishingaustralia.com/uploads/1/3/2/6/132683438/xewopenalemolok.pdfIn PDF document text
    • http://files.churchofchristmontgomery.com/uploads/1/3/0/9/130969501/memisonafo.pdfIn PDF document text
    • http://files.wherelindagoes.nl/uploads/1/3/1/3/131398225/mopapebeguretin_pologexa_malaseraxiku.pdfIn PDF document text
    • https://site-1037120.mozfiles.com/files/1037120/18475090951.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/pupesuxim.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/11016111279.pdfIn PDF document text
    • https://site-1037829.mozfiles.com/files/1037829/66766740440.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/caa85456-fbfd-4496-a2ae-e325cb69b1b0/69971610573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b871ed-e223-4fbc-a6ef-6cc2d5af6f50/66924895226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5584466-6fc7-4004-a04a-1789769da5ca/73255619894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ae0191-8aff-4f77-aafb-a87924329f37/4725955742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84013e0b-dcc4-4a0a-b9aa-243bee8ee569/77269828546.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_off00006729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 5200 bytes
SHA-256: 3c93c7efab5438ae0155beab9979e6e292b9f48491e53f78c98a315cc2bf61e9
font_01_sfnt_off000078f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F2 10472 bytes
SHA-256: ea11081c1eca665ed7db1f6060a42fe5a3174ebeebc3cefb5b65561b097ba0c7