Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca6dd94b27eece5…

MALICIOUS

PDF

54.1 KB Created: 2020-10-12 06:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aa08c307d71dc69a0f856d361e099ed0 SHA-1: e6d4e513fe44c94381ee8aff371c72ca8d41654a SHA-256: bca6dd94b27eece59c0b32ef86ae23bfd35baf09f8be06fd7b59b12aad7e098a
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=agenda+diaria+2019+para+imprimir+pdf In PDF document text
    • http://godex.gabbyurenda.com/uploads/1/3/1/4/131452976/b6f375.pdfIn PDF document text
    • http://files.betterbowlsbako.com/uploads/1/3/1/0/131071253/9396945.pdfIn PDF document text
    • http://dixeke.apparatusdancetheater.org/uploads/1/3/1/3/131398101/mesomafegarago.pdfIn PDF document text
    • https://site-1043537.mozfiles.com/files/1043537/wujojinodoponepunigame.pdfIn PDF document text
    • https://site-1037850.mozfiles.com/files/1037850/bemewopusor.pdfIn PDF document text
    • https://site-1041932.mozfiles.com/files/1041932/bemamejoxavitodutasu.pdfIn PDF document text
    • https://site-1041694.mozfiles.com/files/1041694/40728193066.pdfIn PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/jalanepokudaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/freedom_app_apk_2.0.1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6345/7432/files/lazanurimeparoferi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9261/6388/files/wcpss_calendar_2020-21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba844ea-681f-42b5-9a0d-6d23b9dbd1db/44439723348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab66563c-75ba-4999-ba1f-c575b1a2a5f8/82731418132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9eadbf5-3ae6-4ea0-88a0-099d85b1c6a6/lotewibugilofosij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ab8674-8c47-41c2-bc2c-0779057c969b/43647358272.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_off00009209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9209 5620 bytes
SHA-256: 70a501298be02329fa37dc38e52040544555b5663fc5be81cb333613d7b92dec
font_01_sfnt_off0000a516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA516 11952 bytes
SHA-256: 6a7fc442fac88480b35bc9f627d62baed34abddd72518ef2abb508d6db60d32a

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