Malicious PDF — malware analysis report

Static analysis result for SHA-256 94678f58312574b2…

MALICIOUS

PDF

73.3 KB Created: 2021-04-04 00:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ced32094598b273cf440b0a8e93323b6 SHA-1: b677eda7c6d679e5fdfe7b5efaa79ad1fce360b1 SHA-256: 94678f58312574b2bd844900b996a50abdcd764f5dfe961eabd129da5dc92582
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or trojan delivery. The presence of external URIs and the overall structure suggest an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/123?utm_term=emulator+android+for+pc+free PDF link annotation
    • http://kekijojovif.sportsontheweb.net/gibili.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407986/normal_5ffca35714ec3.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/lareke.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/41bf33ee.pdfIn PDF document text
    • http://vituloza.sportsontheweb.net/colitis_ulcerative_adalah.pdfIn PDF document text
    • https://nezododirexu.weebly.com/uploads/1/3/0/8/130813510/8f038f1c033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421630/normal_601e50b7c3dc2.pdfIn PDF document text
    • https://zijedizadof.weebly.com/uploads/1/3/4/6/134692085/6996454.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/ip_cctv_installation_guide.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/melofomatusabow.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/62892101616.pdfIn PDF document text
    • http://xefijemav.iblogger.org/business_income_worksheet_liberty_mutual.pdfIn PDF document text
    • http://fivaset.22web.org/89448109690.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/zoranafakujaxuxijoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474211/normal_5ff2a1a81ef38.pdfIn PDF document text
    • https://zuladaziduvixu.weebly.com/uploads/1/3/0/7/130740320/volobedil.pdfIn PDF document text
    • https://noremovex.weebly.com/uploads/1/3/4/8/134883944/topojenodu-domebet-rojinosotom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb08ed2-bb6c-4f32-9a2f-191bc1b74e84/how_many_dominoes_to_play_chicken_foot.pdfIn PDF document text
    • http://ravefitupuzam.epizy.com/capacity_of_parties.pdfIn PDF document text
    • http://woposatet.epizy.com/adj_mydmx_go.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98aa1842-1d76-4839-87cb-5ba305e80a10/is_danby_a_good_brand_for_refrigerators.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_off0000e2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 5080 bytes
SHA-256: cc02252ea4e8e4862f44df8337f690e0cc3f228472cc7d5dcff2374969b26b2d
font_01_sfnt_off0000f416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF416 10320 bytes
SHA-256: f379a3a0443dec203a9df00efb874d1c3113777b858fb3d47368baf1d965a61c

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