Malicious PDF — malware analysis report

Static analysis result for SHA-256 990ba5c2566af856…

MALICIOUS

PDF

60.0 KB Created: 2020-10-13 16:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 12ea0c2d36f3b2d4009068981e5cc547 SHA-1: 9cf02070f685ab6da885c4ed5be5741ee06e55f6 SHA-256: 990ba5c2566af85619ba65b29406b9e880652e2bd2e5621d2688f5bb985f5dad
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=parking+permit+template+pdf In PDF document text
    • https://site-1036956.mozfiles.com/files/1036956/70584634155.pdfIn PDF document text
    • https://site-1039828.mozfiles.com/files/1039828/mukewajevutaduwojetafilo.pdfIn PDF document text
    • https://site-1037189.mozfiles.com/files/1037189/78232782712.pdfIn PDF document text
    • https://site-1048253.mozfiles.com/files/1048253/40641076598.pdfIn PDF document text
    • https://site-1040099.mozfiles.com/files/1040099/33659426409.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/fovazisewubepifulunubuwo.pdfIn PDF document text
    • https://site-1039380.mozfiles.com/files/1039380/38628906795.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/4ad687fb-1b2b-4b46-92f2-c4de4b6a08b4/xegop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/369c22f4-e1af-472e-baaa-fe853d3386f0/11299535665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225beece-4485-479c-a342-496c92159805/5872455794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83057b5-dabb-4cbe-ba3a-a9fa3f589786/vanitedusopubipig.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_off0000af86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF86 5248 bytes
SHA-256: 6057c894668af360aa3f9e8208ebeaa629f6b0fc3d50435cffb3aa20fe914c1c
font_01_sfnt_off0000c149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC149 9992 bytes
SHA-256: 5b22a7ecf14b9693bd6b885478cee4deb92fd75ff16c713330a588cb6f410ed4

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