Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ddfe95fed055b7…

MALICIOUS

PDF

46.5 KB Created: 2020-10-03 21:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d7ce3b511655c450633b6425c17d076c SHA-1: 8de9b0b921b5ba067aff993f610bf9d505da9c77 SHA-256: 52ddfe95fed055b72735414599a81718a422412ef5350df419a677c1a60d4687
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=rpi+candidate%2527s+choice In PDF document text
    • http://files.craftedcasesnc.com/uploads/1/3/2/6/132682745/wuranirupaj.pdfIn PDF document text
    • http://files.christianmindfulness.com/uploads/1/3/1/4/131454114/2218603.pdfIn PDF document text
    • http://files.susan-ritz-art.com/uploads/1/3/1/6/131607043/vilefewukujew-wazowota-tafidawu-pirabubugu.pdfIn PDF document text
    • http://files.allaboutyoumedia.com/uploads/1/3/2/6/132695258/fobabis.pdfIn PDF document text
    • http://files.tegriggs.com/uploads/1/3/1/3/131380213/4e53dbd0828.pdfIn PDF document text
    • http://files.mariatzortziou.com/uploads/1/3/0/8/130814076/6052744.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/41b53d97-5efc-4552-9c79-7b11c7762430/kalebukinitewuxowigubigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e13a0519-4ae8-4cd6-af88-6bb27eb50f5f/76025661322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefafc62-cdfc-4376-b522-c851d7e2600e/15960912474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6728b085-1bc8-49cf-9e8a-908cd40398c9/fidufokeduwopugixuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/repek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/32790088064.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_off00006fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 5072 bytes
SHA-256: 035bcd0ab524118924bb9d9c82f114d9e82362fe420a41a97b2604845aeb2309
font_01_sfnt_off00008129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8129 14452 bytes
SHA-256: 43d83da510f786a6c14424e7ff4bab0ea814f24486775d3d2d672bdba4394e98