Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69c370651f3758b…

MALICIOUS

PDF

42.2 KB Created: 2020-10-07 04:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ae0d436783d0c533a68c13ec46a11afe SHA-1: 357b459d79be835a76dda9ff0c269bc579f8f397 SHA-256: a69c370651f3758bf58d86780fbe1c65a48b9fd55d69317734e3e2cc32e062f3
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/strik?keyword=how+to+compress+a+pdf+in+adobe+reader+x In PDF document text
    • http://files.khadineyoga.com/uploads/1/3/2/7/132740842/wofoxusobeni.pdfIn PDF document text
    • http://files.dkpayments.com/uploads/1/3/1/3/131379594/7ae9e703807.pdfIn PDF document text
    • http://files.theyellowsunstudio.com/uploads/1/3/1/0/131071277/57c7ab.pdfIn PDF document text
    • http://files.nelsonbeatsthedrums.com/uploads/1/3/1/4/131452959/xamotakuxeguj.pdfIn PDF document text
    • https://site-1040687.mozfiles.com/files/1040687/10157460173.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/99401882024.pdfIn PDF document text
    • https://site-1039733.mozfiles.com/files/1039733/jeralewilaruxasivotuv.pdfIn PDF document text
    • https://site-1040319.mozfiles.com/files/1040319/92348557124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/12ee69b9-da87-4afb-b5ed-f3d92d770c9e/bomone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ab6343-3932-42cb-b8b4-495552753e5a/88614987967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/740a3a8a-cbbf-4b6c-b6fb-73ce3534a1ae/viluranunenigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5cc2b1-d1ec-41d4-a141-6f5e9b31854a/85529583686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d15546-4528-4d28-bd06-32110461e457/37890133559.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5839 5316 bytes
SHA-256: 85e981d86970688e0b8a713e82c4c7bc7bd23198745aed147da0948823e97c19
font_01_sfnt_off00006a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3D 10672 bytes
SHA-256: 380c0dd4c11704a2f9ad62ae82f2aeba6b883b8b0e631569d56089a14f6bfede
font_02_sfnt_off00008dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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