Malicious PDF — malware analysis report

Static analysis result for SHA-256 315cff53987c4551…

MALICIOUS

PDF

43.3 KB Created: 2020-10-14 17:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cfd633af69d7e8d19c5ba7047227d674 SHA-1: 2def154f1fcfad12d7e4d9008cf2adc73b17533c SHA-256: 315cff53987c45513b550055d7dbed146a2c8ead2a92dda160f3d622819ba52c
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/pify?keyword=pathophysiology+nursing+study+guide In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3355978.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/8767144.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/3cb113af6.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/vanojiraxajerubefiza.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/dekefomivupe-kovak-talajonipa-fedebiraroz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8704e7c7645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8704f2ebe36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f86fc6357b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f86f84237f3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f86f9d3d277c.pdfIn PDF document text
    • https://site-1042014.mozfiles.com/files/1042014/30247794733.pdfIn PDF document text
    • https://site-1040391.mozfiles.com/files/1040391/73359450851.pdfIn PDF document text
    • https://site-1043941.mozfiles.com/files/1043941/ponajapimirefegurewinake.pdfIn PDF document text
    • https://site-1042629.mozfiles.com/files/1042629/bukijipejebopitejiv.pdfIn PDF document text
    • https://site-1040299.mozfiles.com/files/1040299/84220145318.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE2 5324 bytes
SHA-256: 2e4b829e8f6ed04348ba0801ab88809e7a3bd3ecbb6e1bda076645e91e9c8e26
font_01_sfnt_off00007cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF2 10192 bytes
SHA-256: dbf68a4b94f0a52a9836229193cdfd04eabbaa670566c9888136a8b0a741ca0e

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