Malicious PDF — malware analysis report

Static analysis result for SHA-256 205835b276bc967d…

MALICIOUS

PDF

49.1 KB Created: 2020-10-02 23:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b19aba13b75de042c0dbde0a67190d61 SHA-1: 0926901c6f4c2931f8bb819169d20d868b7ff3e3 SHA-256: 205835b276bc967d284912fcc5452de5ad75b2ec069cd4bf51e1d8ee79f94e5e
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=inventory+control+chapter+pdf In PDF document text
    • https://site-1037222.mozfiles.com/files/1037222/97718517955.pdfIn PDF document text
    • https://site-1039892.mozfiles.com/files/1039892/64689166835.pdfIn PDF document text
    • https://site-1038975.mozfiles.com/files/1038975/94595643016.pdfIn PDF document text
    • http://jojuwodig.mrsconnieholmanteacher.com/uploads/1/3/2/6/132683071/rasudofaf-wuluvela-rater-jupubupuk.pdfIn PDF document text
    • https://site-1038946.mozfiles.com/files/1038946/12610498800.pdfIn PDF document text
    • https://site-1040129.mozfiles.com/files/1040129/95834417762.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/12686418460.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/9c66bbec-23b5-447e-974f-010c9fa9b68d/mopowomamal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d812b2c4-b342-459a-971a-a87daaf8cc8a/venazar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ed37edc-b7c5-4078-bcfe-41ee5f82e7c6/lunipi.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_off00008344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8344 5164 bytes
SHA-256: 73e14c0c61ad3c98766b36044acb30529c8b170f532aaa1e8e713ce4aae3f492
font_01_sfnt_off000094df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DF 10444 bytes
SHA-256: 9fbecdfb749f3b8de5c40f66b1db0fed4bbc3f086b863223c99d2a55e6585cfa