Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0ad1e7a1b900d1…

MALICIOUS

PDF

67.8 KB Created: 2021-02-28 21:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2fc057ad8eff0a030cb2796ed9ec22fe SHA-1: db0dcded07e7f4e508940ea57d230cfed78aece3 SHA-256: 8a0ad1e7a1b900d1163570eee76032ed2e022c1e72a9d3f8e34f6b56cf80d566
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML and ClamAV as malicious, indicating a phishing or malware distribution attempt. The presence of embedded URLs suggests the document is designed to redirect users to potentially harmful sites. No scripts were extracted, but the overall structure and heuristic firings strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jacksth.ru/award?keyword=how+to+adjust+carb+on+husqvarna+128ld PDF link annotation
    • http://differencecheats.net/shark_navigator_lift-away_professional_upright_vacuum_nv356eol1i0.pdfIn PDF document text
    • http://nejamaranidirit.22web.org/dukuj.pdfIn PDF document text
    • http://boothattendant.com/vue_framework_7_templatesqf8m.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/En3pjcY/yandex_browser_download_free.pdfIn PDF document text
    • http://cabinetshub.xyz/48162848063mqb5w.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/dCijhca/video_player_banner.pdfIn PDF document text
    • http://copyright-infringement.business/53302973216lv7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5fde6d5347184.pdfIn PDF document text
    • http://vsedlyatebya.xyz/51907261149r866i.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/mZhidih/kigunonoxolusixitanuleku.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/zozuxukoxo/11163274385.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/cinema_4d_r15_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/msi_970a_sli_krait_edition.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_off0000cb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0F 5860 bytes
SHA-256: b3d89e453420b640809ad764803b2cbbfceeb5a1ce7a8bd04993e9b916281b5f
font_01_sfnt_off0000df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 10268 bytes
SHA-256: 4f6aca25361754fa9f5c77b8681df3e595f5d48fd40a1846be7e057e729944a9

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