Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59d12a9d81b6f96…

MALICIOUS

PDF

42.0 KB Created: 2020-10-04 21:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0278c59e24be1fcc5f2477231b7f2383 SHA-1: e006682c1922f3114ec5d5a8f48fbcaa4c6422cf SHA-256: c59d12a9d81b6f9623aa998c87469e11e4697ac395cbd4ceea202d31df061294
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/pify?keyword=atlanta+public+schools+calendar In PDF document text
    • http://files.6thstagnesscoutinggroup.com/uploads/1/3/0/9/130969659/38d6b527.pdfIn PDF document text
    • http://files.leathercreationsbyrenee.com/uploads/1/3/2/7/132741225/sirexorifokib.pdfIn PDF document text
    • http://kaxine.hoylandspringwood.org/uploads/1/3/2/7/132741269/limati.pdfIn PDF document text
    • http://zaxupemim.cwclab.com/uploads/1/3/2/3/132302912/bilepoxobex.pdfIn PDF document text
    • http://files.gelatin-gmia.com/uploads/1/3/1/4/131406855/8238338.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/lolubusedigetumifebuge.pdfIn PDF document text
    • https://site-1042187.mozfiles.com/files/1042187/tajesisetovokapuxikukir.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/zivodalesasaxavupibubosaf.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/85173319119.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/06927fa0-d17b-4dca-863c-b01ee00110e2/gokakego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04567fcb-0f01-4129-8c40-73bc396e37f6/gubidolekunumododuwanek.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_off00006729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 5288 bytes
SHA-256: b6ac51754472495f30855872b697094cff416fe8fe3f64ca7227fb6ecefbf22e
font_01_sfnt_off00007913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7913 10176 bytes
SHA-256: b0128030455c1295f92976b64806ea622d45a21652d2dc7f11a1c4c9135237ee