Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ace5b84559edd3…

MALICIOUS

PDF

76.3 KB Created: 2021-06-10 10:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 48c7ac072313dbfa03fb2d3e7235b386 SHA-1: 65b6241438e2600d3d14fd33fe9dbd3d33b266e8 SHA-256: 75ace5b84559edd316d63dd025a9bde0e9a852f18e4f092261ee6794d411401a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one prominent URL being https://pixomot.ru/pbw?utm_term=free+fire+hack+download+app. The heuristic PDF_SEO_LINK_FARM suggests the PDF is designed to host a large number of links, likely to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pixomot.ru/pbw?utm_term=free+fire+hack+download+app PDF link annotation
    • https://ninadagonalot.weebly.com/uploads/1/3/4/6/134668818/newalu-tolagusufeja-rusobotukuw-momaluloruw.pdfIn PDF document text
    • https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/fepifirowad.pdfIn PDF document text
    • https://dozosiwogaw.weebly.com/uploads/1/3/3/9/133989014/8989266b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450257/normal_5fe6eea512395.pdfIn PDF document text
    • https://vegirizixe.weebly.com/uploads/1/3/4/7/134716682/d60e78a131a01.pdfIn PDF document text
    • https://wozexapumodokeb.weebly.com/uploads/1/3/0/7/130738903/b8ca146f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410431/normal_6009033b10132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417032/normal_60648fe15bedc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_600abef330aac.pdfIn PDF document text
    • https://wexapifunoru.weebly.com/uploads/1/3/4/7/134715363/poxipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_6046651303f6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funinupun.pbworks.com/f/extreme_landings_pro_pc_free_download.pdfIn PDF document text
    • http://zuwofig.pbworks.com/f/kabujokutigojezabi.pdfIn PDF document text
    • http://vokoperoj.pbworks.com/f/nomabejizajolilekalotagi.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144422928/lujojebo.pdfIn PDF document text
    • http://nadisizaze.pbworks.com/w/file/fetch/144667647/2356568191.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144782880/93593446700.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/f/how_to_install_a_wireless-n_wifi_repeater.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/f/20337000945.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144417444/gagobepejepotezowiriwez.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_off0000ecb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 5176 bytes
SHA-256: b882d687fc89fca42491c99298d6848e0df16036116a3615452c03cbce8a593b
font_01_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 11088 bytes
SHA-256: c63112fc8d25d6cddd67fc315d4bd5bec78d0fb409abb280bf5eab6dcc1ce18a

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