Malicious PDF — malware analysis report

Static analysis result for SHA-256 300499a32d2465e5…

MALICIOUS

PDF

39.2 KB Created: 2020-09-29 23:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 174007084d8039227eb757bc3805f815 SHA-1: 8d547a5a8c713b3a4e10c9d6f17812c30916995a SHA-256: 300499a32d2465e55999504b39ffe35c07b343798c54fb8ee6498a158cfcab09
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=nucleophilic+and+electrophilic+substitution+reaction+pdf In PDF document text
    • http://noditefas.spinclass.org/uploads/1/3/1/4/131438783/zeraf.pdfIn PDF document text
    • http://lodev.wilmaderksen.com/uploads/1/3/0/9/130969723/dupadezeg-lebiloneri-lawazoxadoke.pdfIn PDF document text
    • http://files.snowtroopers.net/uploads/1/3/0/7/130775002/jored.pdfIn PDF document text
    • http://files.wellness.org.sg/uploads/1/3/1/4/131437249/7598015.pdfIn PDF document text
    • http://files.clairecoulter.com/uploads/1/3/1/0/131070169/b659d6711b7.pdfIn PDF document text
    • http://files.robotballerina.com/uploads/1/3/0/7/130776077/8624636.pdfIn PDF document text
    • http://files.theaveragejose.ca/uploads/1/3/2/6/132682829/noxuvagawox.pdfIn PDF document text
    • http://files.access2college.com/uploads/1/3/0/7/130776611/giseditikikesolesa.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/8ed686d9-855c-415e-97e3-ac5641185dba/86098430766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e287711a-3d9b-4f50-b0cd-e7c905ef5dca/92808826931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/32229547958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/puxemifumetokitujono.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_off00005bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBE 5352 bytes
SHA-256: 310cf8aee7cb18c5652834ee974d14e229900d9e01d569f56d9d430a3cfb9e82
font_01_sfnt_off00006de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE6 9852 bytes
SHA-256: db6d107a3463bff29051f745d457c607f38029429e2390ee9acfc1e65030b7bb