Malicious PDF — malware analysis report

Static analysis result for SHA-256 73531403eaa465c9…

MALICIOUS

PDF

42.4 KB Created: 2020-10-14 04:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ef628b7d4d751e96feb97219009a5a76 SHA-1: 7f49e61fa150608624cf0ba183f39d11674eeffd SHA-256: 73531403eaa465c9fa6358bb29d0b97f76eefb7944c86f64e9fec11ec9104abc
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=nice+guidelines+for+hypertension+in+pregnancy+pdf In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lonevu.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://site-1040165.mozfiles.com/files/1040165/85722354057.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/48091938784.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/78962a5a-38da-4e04-b23e-033214b2c8df/zusufuruginakudekonatiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc85730-ef42-408b-87f0-bf588fc7e382/furezalibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f1d59a-e3f7-466e-a3a3-fc52abf4d801/xewume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9041/4230/files/used_tennis_ball_machine_for_sale_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9050/4599/files/63060710881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9698/0136/files/55871368308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2600/1315/files/95392186390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4535/8234/files/bee_movie_script.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_off0000676c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676C 5488 bytes
SHA-256: 8b694b99f1aa488925d7860a23b9febc7666c36466a4ffb2509a5dc3110ecb19
font_01_sfnt_off00007a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A13 9948 bytes
SHA-256: 5b9d20defd0df94769103023b8274ddaabf02fa771a0ea3cb4d67377dcacddae

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