Malicious PDF — malware analysis report

Static analysis result for SHA-256 256597315c5f853d…

MALICIOUS

PDF

47.4 KB Created: 2020-11-09 11:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 79c643e4877e7f4d4348f0414f405d08 SHA-1: 78e7876aa0153cd7b16a562aedcbdf15933ef84b SHA-256: 256597315c5f853d1a88a576744417347533b52e24f554aea9d909abc4cebe07
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://traffine.ru/aws?keyword=summer+waves+pool+assembly+instructions+video In PDF document text
    • https://rusunesezov.weebly.com/uploads/1/3/4/3/134309606/wilukepigasez_zevemogaxapi_gesubejoke.pdfIn PDF document text
    • https://tenaxegib.weebly.com/uploads/1/3/4/5/134583113/zepigabimuxek-wezijitinujevij-newapaku.pdfIn PDF document text
    • https://garagagu.weebly.com/uploads/1/3/4/3/134364865/juwanabedavizawowe.pdfIn PDF document text
    • https://juxokiwi.weebly.com/uploads/1/3/4/5/134594748/tobezutefurirorudoxu.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://juzolafer.weebly.com/uploads/1/3/4/3/134382033/1059492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408186/normal_5f957a04c2aac.pdfIn PDF document text
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/lavaz_gabekuw.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/5459230.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/suwax_morekijat_basesugo_namewodovuli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/lewiston_high_school_maine_employment.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/meiosis_foldable_activity_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/31155900368.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000629d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 5716 bytes
SHA-256: dbc4ba181486510e4f6714d8fb2427f53b2f1dc0164ffbe69f21dc48b9926c97
font_01_sfnt_off0000760b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760B 10816 bytes
SHA-256: 4ef308894cb87ebb49a635b05253b23a8923bb1bba97d95ee09caafc3e093859
font_02_sfnt_off00009b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B51 16204 bytes
SHA-256: f04fb96856fa86c99babb5bf309615b780632e07d2318923ed038a7bfd4fd4ce