Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f6c8e33cec108c…

MALICIOUS

PDF

41.7 KB Created: 2020-10-02 11:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2d98902e0fb9da4e162560678d8dc26c SHA-1: f574f62c25b2acab795df542a5200c9001a87ca4 SHA-256: 44f6c8e33cec108cf0c5acdccf1dda7614a1d0a17a52b1f06517351a95de3ef8
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=aura+libro+javier+ruescas+pdf In PDF document text
    • https://site-1039636.mozfiles.com/files/1039636/7681845643.pdfIn PDF document text
    • https://site-1038974.mozfiles.com/files/1038974/fuwegusirik.pdfIn PDF document text
    • https://site-1037282.mozfiles.com/files/1037282/67956803996.pdfIn PDF document text
    • https://site-1040359.mozfiles.com/files/1040359/40926810204.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/73311129469.pdfIn PDF document text
    • http://files.2018flyballnationals.org/uploads/1/3/0/7/130776268/kidipu-pevexutitumixo-zidelusowav-dugomuremere.pdfIn PDF document text
    • http://files.aacabluegrassregion.org/uploads/1/3/0/7/130776409/43c9ed1.pdfIn PDF document text
    • http://pagidib.fpcchurch.org/uploads/1/3/0/8/130814010/zuwujusabeguwo_dabumo.pdfIn PDF document text
    • http://kezenemif.pilgrimcamp.net/uploads/1/3/1/4/131438860/1e3016a60e85cd.pdfIn PDF document text
    • http://files.cristinapoleacovschi.com/uploads/1/3/0/8/130813643/fuduvekawajunaz.pdfIn PDF document text
    • http://files.iaeast-ptia.com/uploads/1/3/0/7/130739287/1e18bd2d3.pdfIn PDF document text
    • http://files.mesamindfulness.com/uploads/1/3/1/3/131384335/c54a97c33ffd1.pdfIn PDF document text
    • http://files.isaksonchiropractic.com/uploads/1/3/0/8/130814466/3b638.pdfIn PDF document text
    • http://ninopiwuv.dutchhillfarm.shop/uploads/1/3/2/6/132681887/0e215.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/1/0433/0360/0283/files/decode_ethics_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8890/8959/files/70839942708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/83498956612.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6157 5412 bytes
SHA-256: 867b473d109713748b7ccb3af11bc291a870d4b686f747cfa30308b351e7169d
font_01_sfnt_off000073d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 11148 bytes
SHA-256: fd6e19f5e5c8ad5bd9379bcb569828c12b067e67b52dcbdffae73e9aa7205083

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