Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa238ac9f4863cab…

MALICIOUS

PDF

82.8 KB Created: 2021-02-11 21:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 79fce0a66e248e1cf585bdcf671389e5 SHA-1: 3e346aa6f384bb7e3fc249f42b962dbaf73d56eb SHA-256: fa238ac9f4863cab156468d157820547c6098e48753ab84aada2ab610250ccd2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically pointing to 'jacksth.ru' and another to 'cdn.sqhk.co', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment used to redirect users to potentially harmful content.

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/123?utm_term=skyrim+the+forsworn+conspiracy+quest+id PDF link annotation
    • https://cdn.sqhk.co/jasojime/nSQYDgf/toolbox_talk_template_word.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_601c7bb6b264e.pdfIn PDF document text
    • http://avit0.cc/historia_del_pensamiento_politicongk9p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_6000347a28d5d.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/hahMjgx/pixel_starships_wiki_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/wgdKwyi/mx_player_download_apk_softonic.pdfIn PDF document text
    • http://meetcabinets.xyz/59321405693ndjj.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/giijfgd/vat_number_check_hmrc_vies.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/gjieiaB/xikawiron.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/idoiijc/red_robin_royalty_online_order.pdfIn PDF document text
    • http://prostotit.site/t-_mobile_tech_experiencevbe7r.pdfIn PDF document text
    • https://cdn.sqhk.co/sekijebasazi/amuOifO/account_balance_sheet_format.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367271/normal_5fcf741156a6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabozet.epizy.com/sample_liquor_inventory_spreadsheet.pdfIn PDF document text
    • http://zixoridepub.rf.gd/google_sheets_desktop_version.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/gifepimaguximofikamodun.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/63700077929.pdfIn PDF document text
    • http://mesuwirafifi.rf.gd/10109249735.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_off000106fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FB 5848 bytes
SHA-256: 7f2a38380e92fdc99f16e2678ec15fcc31bbba47f14807eab2c6ee28d35c65c8
font_01_sfnt_off00011ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD7 10108 bytes
SHA-256: 588c327693410d1ebb5f533cef3f8831ced50ee42ccf680a99e48358a5a8b2bf

Open this report in the interactive analyzer, or submit your own file for analysis.