Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c137823b1d42799…

MALICIOUS

PDF

44.9 KB Created: 2020-09-30 16:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 21adbf098dda3b653f2f0285371d9bb2 SHA-1: 3a4d5e768e5a84815fff163e474ed992877c6b45 SHA-256: 3c137823b1d42799e74c3c0a2901578b22f7c34d416d4758efc9e53ee12ffe2b
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://ggtraff.ru/strik?keyword=complicaciones+toracicas+del+absceso+hepatico+amebiano+pdf In PDF document text
    • http://xavukasag.littlecedarcemetery.org/uploads/1/3/1/4/131456363/6344692.pdfIn PDF document text
    • http://rafata.sanantoniobottledwater.com/uploads/1/3/1/6/131607239/gomep_rivovakunele_dajuvo.pdfIn PDF document text
    • http://files.257bennettstreet.com/uploads/1/3/1/4/131483830/ziluxuwobi.pdfIn PDF document text
    • http://wobemi.alexandriatalley.com/uploads/1/3/1/6/131606122/gopax_panisaxaze_nofavarewunuwe_vukinusev.pdfIn PDF document text
    • https://site-1038913.mozfiles.com/files/1038913/71018500834.pdfIn PDF document text
    • https://site-1037914.mozfiles.com/files/1037914/bavijimatozibituwipofis.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/50021925709.pdfIn PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/74196896804.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/1/0440/0129/6534/files/business_plan_template_ppt_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/nowadofemerex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/pagutosoton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0633/6930/files/46641302717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2215/5930/files/dapebuxugowa.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_off00006cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB6 5440 bytes
SHA-256: fb4b8fe1a9ca449f85e45d49e1313f6aa6f39b84b08277e2984d175b07d9aeee
font_01_sfnt_off00007efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFB 11408 bytes
SHA-256: cd56955a81d575231ef85015abe3d13445987cebe5bd4a88becf5344e63f83d9