Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9db58e711aaaa95…

MALICIOUS

PDF

43.4 KB Created: 2020-10-09 00:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8fe68c363fc39373c49fd39d3267f8af SHA-1: 59cac73dfe00a34874b43d9a066bc32ebec551e8 SHA-256: a9db58e711aaaa95ac3f440bc52b61e9339e8305c8e66d3969fe7b29aea3011d
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://cctraff.ru/strik?keyword=a+library+contains+2000+books In PDF document text
    • https://site-1036930.mozfiles.com/files/1036930/69239391728.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/tadotuwidegifigewutixem.pdfIn PDF document text
    • https://site-1040045.mozfiles.com/files/1040045/vejeditisopo.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/28982406547.pdfIn PDF document text
    • https://site-1040670.mozfiles.com/files/1040670/97586704082.pdfIn PDF document text
    • https://site-1037865.mozfiles.com/files/1037865/29842272798.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/90516411271.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/gokosox.pdfIn PDF document text
    • http://files.athenskidsmart.com/uploads/1/3/0/7/130775980/feniva.pdfIn PDF document text
    • http://files.terryrich.co.uk/uploads/1/3/0/8/130813804/zojuwizom.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/ab760655-8a58-4e05-be11-02560f6a2d58/20756211213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12f5be1-be3c-4d25-b2d9-cee079b87871/15985367489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98bd96d-ae7b-4d8c-9306-4215d8e166e4/17079540493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4f0a80-e7f9-4111-8014-b7104fd86a55/21154483250.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C43 5364 bytes
SHA-256: 17f47def351558eabc68d9ee0c732ca83aa2d145e49bcb73c151cfc4af02c5e2
font_01_sfnt_off00006e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E95 15296 bytes
SHA-256: 60f5f7bd0bcdc41468c398c4e572402038da49f10e552536733cfeac3fceef2c

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