Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b741cbf6d1f7110…

MALICIOUS

PDF

44.2 KB Created: 2020-10-15 22:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 83fb2af1e42b519e211b1a71a5099b9e SHA-1: d119678e06b921dafac7c0180d00503815fa999b SHA-256: 8b741cbf6d1f71104b6bbb43726626d5de55975d6708c13b01b0a5887f64c904
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://gettraff.ru/123?keyword=history+and+philosophy+of+psychology+pdf In PDF document text
    • https://site-1042095.mozfiles.com/files/1042095/vetavazitorarutit.pdfIn PDF document text
    • https://site-1040391.mozfiles.com/files/1040391/moresejumiwisudiruz.pdfIn PDF document text
    • https://site-1036881.mozfiles.com/files/1036881/wunoxitebewaxagitofomo.pdfIn PDF document text
    • https://site-1043335.mozfiles.com/files/1043335/36143117635.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/jokivikawivajom.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/7600545.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/1d3d5152ce.pdfIn PDF document text
    • https://site-1039703.mozfiles.com/files/1039703/bebojixunanaker.pdfIn PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/17709064717.pdfIn PDF document text
    • https://site-1040048.mozfiles.com/files/1040048/ziboku.pdfIn PDF document text
    • https://site-1038631.mozfiles.com/files/1038631/jekinumafamaxasim.pdfIn PDF document text
    • https://site-1040216.mozfiles.com/files/1040216/7341702004.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.pdfIn PDF document text
    • https://site-1040612.mozfiles.com/files/1040612/jutiloruzagexuv.pdfIn PDF document text
    • https://site-1048485.mozfiles.com/files/1048485/slope_fields_worksheet_answers.pdfIn PDF document text
    • https://site-1040388.mozfiles.com/files/1040388/javetilutiduwojujutam.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_off00006d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D46 5480 bytes
SHA-256: 9a957f6ff53870b1a29e3631defa283f595d180654d0254daf86e204a8c6e6c8
font_01_sfnt_off00007fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE0 10520 bytes
SHA-256: 24cf1ff92c52a57945556292874abb23c73aee06cf79a7c7523ccdc5974e38b1