Malicious PDF — malware analysis report

Static analysis result for SHA-256 303aa1b3f5d1ea8a…

MALICIOUS

PDF

45.2 KB Created: 2020-10-02 09:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4aed6b774695ec2b8d079cee62b2e903 SHA-1: ec6822a8b679c8d4fc633ba3a05e5ed387715a4a SHA-256: 303aa1b3f5d1ea8a0dff3c53bb8d34ffd22465f76ed0d20a0933c81af3ca8777
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=cwna+guide+to+wireless+lans+3rd+edition In PDF document text
    • https://site-1038679.mozfiles.com/files/1038679/4698228642.pdfIn PDF document text
    • https://site-1039280.mozfiles.com/files/1039280/xakafadavulejosofok.pdfIn PDF document text
    • https://site-1037152.mozfiles.com/files/1037152/43390155931.pdfIn PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/55979491311.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/9244080538.pdfIn PDF document text
    • http://files.chantelleko.com/uploads/1/3/2/8/132814276/nazija.pdfIn PDF document text
    • http://files.reliablealliancefinancialllc.com/uploads/1/3/1/3/131384171/3e464fb4c7cc.pdfIn PDF document text
    • http://files.brunswickvalleyschoolofdance.com/uploads/1/3/1/0/131069934/9461153.pdfIn PDF document text
    • http://wopanowuf.lindenweitz.com/uploads/1/3/1/3/131380845/xopeguku.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/103cdc07-9dff-4453-8499-04d4fa01cc09/nibabeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d50f253a-3378-4ab6-86f5-1ea51a39ba14/54353179692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d3a23e-f067-4ffc-9745-9e9c61c2c972/63171973365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc6ab9f-a7e0-4630-b985-f0d90bb98d7d/24016418406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca7435d-ef76-4ea2-955b-4f86dde580e9/vowovot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccf3a77-897e-4aa5-9587-6f5c82c80fa3/duxewupokajibusexibem.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_off00007302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7302 5152 bytes
SHA-256: 5ac321b0b3c724488a8cb35fe624279869ef71efcc824f221c33578e8e43dd56
font_01_sfnt_off000084ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AC 10200 bytes
SHA-256: 5f21d7a218a2527b6c78c6688473813c4bad03d8e18e49b404879b8ad32884e9

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