Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0040cd6e19955d3…

MALICIOUS

PDF

35.3 KB Created: 2020-10-03 19:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c4eced535faa86ea3acb79daa5ce4b5f SHA-1: 66f00525a39a8d1790a9f69ecdeec0d1f1c4664a SHA-256: e0040cd6e19955d33b203b6153d196bee7a6b1b033a8b35563edcaf18017f39c
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://gettraff.ru/strik?keyword=nancy+caroline%2527s+emergency+care+in+the+streets+canadian+pdf In PDF document text
    • http://nasubibu.pianowithlisa.com/uploads/1/3/0/8/130814311/7563356.pdfIn PDF document text
    • http://linomur.number38spa.com/uploads/1/3/0/7/130739906/aa5d748be2842.pdfIn PDF document text
    • http://files.tannerpittmanlaw.com/uploads/1/3/1/3/131397946/d2aaf8a078cc.pdfIn PDF document text
    • http://sudipefa.equusmedendi.com/uploads/1/3/2/7/132740564/fidibejarivosoxip.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/63937321020.pdfIn PDF document text
    • https://site-1040363.mozfiles.com/files/1040363/78107552460.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/46190425429.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/78260428183.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/28f8c0e9-6255-4e9f-b87e-54fd85cb7616/jirabivomaraxumitoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd03e81-c6bf-4e4e-b7c0-e582430d09a9/10453671917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93853e42-5674-4d16-b273-f1382f053ec5/9053262776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c95d311-4c6c-4693-a600-e08a8c74a965/64629439220.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_off00004c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C80 5672 bytes
SHA-256: cc05227cdb2370e93b8ffa34457cdf6e0557c4d1a37e7bbeeddc1ac5f7fbab1c
font_01_sfnt_off00005fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBE 9424 bytes
SHA-256: 0415f231392477dac68945591f88ca601159add9e67a1cc55c0d5a11e30d67c6