Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a8a4a2267d6a6a…

MALICIOUS

PDF

40.7 KB Created: 2020-10-07 10:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 36bd718f84a7306ce95fa9d12356d5c1 SHA-1: b17844db0480ca98618bce92d27107c19845cccd SHA-256: f2a8a4a2267d6a6a17079fd1854c7015d28d744f8de61badfa4ae2baffab508d
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://gettraff.ru/strik?keyword=enlace+covalente+sigma+y+pi+pdf In PDF document text
    • https://site-1038725.mozfiles.com/files/1038725/96742126487.pdfIn PDF document text
    • https://site-1036921.mozfiles.com/files/1036921/mesetafalud.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/77471361162.pdfIn PDF document text
    • http://files.ammoswald.com/uploads/1/3/1/3/131378771/4418609.pdfIn PDF document text
    • http://files.chocolateriechocomax.com/uploads/1/3/1/3/131379948/xamewelisapukijowu.pdfIn PDF document text
    • http://jamaj.theopenbus.com/uploads/1/3/2/6/132683138/vamusedejagi.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/1/0482/6578/9602/files/61328148202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/organic_chemistry_solomons_10th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/vocabulary_workshop_level_b_unit_8_answers_antonyms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2297/4627/files/zodabufibajudofurid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0041/3346/files/great_escape_12_new_albany.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61fa8aaf-f57f-4d30-bb4e-c1fbfd47413b/76177370303.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_off00005e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5A 5496 bytes
SHA-256: 70016f84af643a3dafbe0501a5d61b45c9adc4c1170676f8e916bf0bb72175a7
font_01_sfnt_off00007119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7119 10908 bytes
SHA-256: 5b852d15b30135ab20fdf4ed623eaaf8576f8e8551aa26a39166f014f7fa4bcf