Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a321177ef269dc3…

MALICIOUS

PDF

41.2 KB Created: 2020-10-03 22:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 71614c1d0677acd2cb415af7fa0daccd SHA-1: 217951ad10fb462d0a298b488819b0a48b860944 SHA-256: 8a321177ef269dc3cfd8a03af4150d9200e1ea0f09b82ff589be29c22fef5551
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://ttraff.ru/pify?keyword=lego+cinderella+castle+light+kit In PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/18508794673.pdfIn PDF document text
    • https://site-1036871.mozfiles.com/files/1036871/keranekipafusurerama.pdfIn PDF document text
    • https://site-1040982.mozfiles.com/files/1040982/nagamori.pdfIn PDF document text
    • http://files.bkhouse.services/uploads/1/3/1/4/131407035/0a16222e6db80b.pdfIn PDF document text
    • http://rodazesat.dharaniyoga.com/uploads/1/3/1/3/131383771/3f758.pdfIn PDF document text
    • http://files.fnqfestivalcubano.com/uploads/1/3/1/8/131871799/d5fa42.pdfIn PDF document text
    • http://subemax.irpanimation.com/uploads/1/3/0/7/130738779/2089309.pdfIn PDF document text
    • http://sexevoz.crotonlibrary.org/uploads/1/3/1/4/131407406/c0c59e8.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/aeddcbf0-13f5-4a3f-b976-f844ef93de1f/63905971534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0c1f73-9cb1-451e-9bf5-3e4f5303ae3b/pofebagegut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acddc2da-0ee1-4072-a61b-7c53e224ae76/55391719677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13635977-56ba-40f5-abac-46b291cdf2a7/sufizejepawel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8ee0b32-bf37-4067-abfd-ce150156f44f/23294393724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57927647-abda-45f2-b773-8f985b3bd667/rugojefuwoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd57f3fa-331c-42f7-8ae4-b806346cac28/xojadijezodexabaliko.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_off00006207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6207 5204 bytes
SHA-256: 1e4796f512f8e2624bfd020a0494592c077699e54c7c378318982ab58825e1ba
font_01_sfnt_off000073b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 10456 bytes
SHA-256: 663db8cea9b12eaa4bfa4ba91e99ff8c7d91605fa1c4ef7b1811dd36c2c34ea2

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