Malicious PDF — malware analysis report

Static analysis result for SHA-256 15eed9aa2f895f76…

MALICIOUS

PDF

47.6 KB Created: 2020-09-30 11:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 73bb1343cc8aa3468517a860d6c48cae SHA-1: 7006825890a8f31d383555de51b5ed67f4f9fa26 SHA-256: 15eed9aa2f895f768aab44c5fd3ce31e5be7aa36c88c1853ea028d4b8523b12f
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://cctraff.ru/strik?keyword=bending+stress+pdf In PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/kiwenesafedifusopesike.pdfIn PDF document text
    • https://site-1037059.mozfiles.com/files/1037059/82717692944.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/pasisubu.pdfIn PDF document text
    • https://site-1036956.mozfiles.com/files/1036956/15576791198.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/63280156089.pdfIn PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/25500564209.pdfIn PDF document text
    • http://files.kwongwingkwan.com/uploads/1/3/1/3/131398547/gixuvit.pdfIn PDF document text
    • http://poviri.bettervoicescoach.com/uploads/1/3/1/6/131606490/2795121.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://cdn.shopify.com/s/files/1/0433/1202/1662/files/girikijuxudoginepelaxitij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/fajatenebuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/taxexagivolapadadulid.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_off0000715e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715E 4692 bytes
SHA-256: b669130142de3e1868165d273e594b281ae7edad7394f85c35829bf54a0b364f
font_01_sfnt_off0000815f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815F 9916 bytes
SHA-256: ca6680c602a62da9539b12526c57a86232e04b507e6751217abb3e70ecdee2cc
font_02_sfnt_off0000a346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA346 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c