Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0689b9c6d88c5e5…

MALICIOUS

PDF

37.3 KB Created: 2020-10-01 21:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: eae0580493e6c0e8ed3011ce2dadcdcc SHA-1: 27a29a62008a51026546134ce97565e7348df5f3 SHA-256: b0689b9c6d88c5e5565dc439c6c1f23a60a29dc9c1fadf8a6c96cd4a0ec53cdc
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=direct+and+indirect+speech+worksheets+for+class+8+cbse In PDF document text
    • https://site-1040092.mozfiles.com/files/1040092/madanivazokavudoxokanewov.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/70615629649.pdfIn PDF document text
    • https://site-1040391.mozfiles.com/files/1040391/91155028860.pdfIn PDF document text
    • http://pawijunen.bigtop.org/uploads/1/3/2/6/132682006/3119613.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/50183254280.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/73723554585.pdfIn PDF document text
    • https://site-1038944.mozfiles.com/files/1038944/nasubetedufeneguvosirol.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/73417755521.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/ea2e5f29-a205-4f5d-98a1-2cab8dfae8ae/zisovukebatenogamomik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe3bffc-44cb-41fe-9bb2-218bbfb742c3/1897650768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8817e9f5-46ee-476f-8171-851b29f5a3d5/zarulanazofidadijovogin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb88b788-151f-4e91-822b-4aa8ac8e1f36/31394663378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21a3fae-dc42-4e0a-bbb9-778a66bcd8f4/tomidupamifenunavad.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_off000052fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52FD 5732 bytes
SHA-256: bff9cd6010665e76545ff4b0314494ed62d4e4420cabc6f9cad9c3c3d7ff360d
font_01_sfnt_off0000668e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668E 9932 bytes
SHA-256: 6684218ce68ea9b2b3ce630e065f6cfb438c8af37c74c5fffb51fbd55c9ef64c

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