Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a0adc02b71cf65…

MALICIOUS

PDF

44.3 KB Created: 2020-10-07 02:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2d1f0678404aed834fbb23bbf6821461 SHA-1: a6416b9a6b6056da51c526f26f3206c39176c4df SHA-256: 13a0adc02b71cf659b5934520e623e35a22829cd9b4652adc90d7b231b379c95
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=canticorum+jubilo+music+sheet In PDF document text
    • http://files.lajkonikchicago.us/uploads/1/3/2/6/132680853/rebejufataragowen.pdfIn PDF document text
    • http://jowuvu.kevinmbakker.com/uploads/1/3/0/9/130969060/ginuxekat_xodomojamutux_ganopaxa_lodazegafan.pdfIn PDF document text
    • http://jomefawi.tapintunein.com/uploads/1/3/1/3/131380591/kapapakiwuvuwag.pdfIn PDF document text
    • http://wepadefe.kdfiredup.com/uploads/1/3/1/3/131379371/wiroj_nubuxoseku.pdfIn PDF document text
    • http://files.laskodrinker.net/uploads/1/3/1/3/131380728/79f3225b010a7c0.pdfIn PDF document text
    • http://files.maricelagutierrez.com/uploads/1/3/1/6/131636965/1185897.pdfIn PDF document text
    • http://files.westjaxbaptist.org/uploads/1/3/2/7/132710569/438e30f406e4d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6445/8405/files/dragon_world_hack_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4353/2185/files/soxepelositaxiliruwox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/aerial_yoga_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1216/1175/files/fodujuwijorunakenen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b2107b-dca6-4f8a-8eaa-25de21aaa6a0/30929200492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d31df995-3f0a-4fa9-a345-5ef5f75fb123/12237863686.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_off000063b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B5 5160 bytes
SHA-256: 315fbb7a46aea9219da0adebfcd2e90dabaed44b13e79cace38259a37bfc2941
font_01_sfnt_off0000750f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750F 14588 bytes
SHA-256: 0889d57115e218e231f08a910b6e1f8a7a827f125bbf8e189ac7e3dc5ae8a660