Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a89f9a2b08241b…

MALICIOUS

PDF

42.1 KB Created: 2020-10-01 23:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 38bfc74530541ba28213d51befe126a6 SHA-1: a78204aa84468d7c4f47c47ec53ea57bea00c3b3 SHA-256: c5a89f9a2b08241b2a81e77459338bde7e2938dd064a84626b04a506645aa72a
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=ernest+hemingway+a+moveable+feast+pdf In PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/rogufapegimafesevizega.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/24021926986.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/34366609275.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/wafigavo.pdfIn PDF document text
    • http://butifogan.runningwithspiritbabies.com/uploads/1/3/0/8/130874455/9229584.pdfIn PDF document text
    • http://files.delriohispanicchamber.org/uploads/1/3/0/7/130775393/2396969.pdfIn PDF document text
    • http://files.taypiping.co.uk/uploads/1/3/0/8/130813135/jexib.pdfIn PDF document text
    • http://files.thundapaw.com/uploads/1/3/1/4/131453226/zenanopelolo.pdfIn PDF document text
    • http://files.phoplayca.com/uploads/1/3/0/9/130969440/4383633.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/6701240277.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/30174028160.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/donotogimowufafirovum.pdfIn PDF document text
    • https://site-1039830.mozfiles.com/files/1039830/47133313923.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/1/0428/5559/6198/files/nedorudetadolubujix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/horry_county_register_of_deeds.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_off00006323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 5808 bytes
SHA-256: 82a61dbb7ff839579d95c6ceb79583e2941a294f9b0becc933289b207e2f4ead
font_01_sfnt_off000076dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DC 10748 bytes
SHA-256: a37e2cb8b82c197c01339376bec13ed009f3d063f9683bb5abaa5494a1f1f405

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