Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a093437a0981e0f…

MALICIOUS

PDF

40.8 KB Created: 2020-09-30 10:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b6faf90c60ea651cb3afe525d2e7c9ba SHA-1: d6c5d49a05c08fb0d5183230f8b20922cd115997 SHA-256: 3a093437a0981e0f644dbbd18cfba58848abe4997681e65b4e184532fd4275e1
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=digital+drawing+for+landscape+architecture+pdf+free+download In PDF document text
    • http://kizawa.sirratleather.com/uploads/1/3/1/6/131637365/2818511.pdfIn PDF document text
    • http://galiw.ghentlacrosse.com/uploads/1/3/0/7/130775934/ca7a4e.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/puverasefawomesuxejuzam.pdfIn PDF document text
    • https://site-1036684.mozfiles.com/files/1036684/83952741061.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/lemosonefodunonalofekuxu.pdfIn PDF document text
    • https://site-1036649.mozfiles.com/files/1036649/72640387246.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/35755802744.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/a78f89c8-3169-4f5b-a721-5e18ecf146ab/tabukusulikorapilom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0d1f71-65eb-44e3-9106-2d0832d4eb39/dufelafigukumaladutoleri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d49d12a-ad10-4120-8925-1474060edf12/zaroligeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe7dab3-0768-4ab7-9c0d-b7e21d030b68/77415357846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/samoveketitasedewoxav.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_off000060ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 5508 bytes
SHA-256: 40b3806ce30c4e40d88a0d09518b31541163140f9a4263ddeb41e618af0afd9c
font_01_sfnt_off00007380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 10108 bytes
SHA-256: 296e0eb67bd80cbdf034822e0923ac9196756d54b88e6f277c402d855dd40381