Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74eac7c15c80f49…

MALICIOUS

PDF

87.9 KB Created: 2021-03-30 18:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3d62f1e53717f659ffe034fe53159b6e SHA-1: eef19def20af59822822e53cb35481ac921d0cc1 SHA-256: f74eac7c15c80f49ea7a84d47fe61841d3973d01672acd74ce5f4303e94af41d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous links to external websites, with one URL specifically identified as a link farm on disposable hosting. The document body, though heavily obfuscated, appears to be a lure, likely attempting to trick users into visiting these malicious sites under the guise of a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=what+does+en+stand+for+country PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5ffb12291ebf9.pdfIn PDF document text
    • http://bamiluzigu.mygamesonline.org/lokiwurelazewedutina.pdfIn PDF document text
    • http://bokugezus.66ghz.com/63018315461.pdfIn PDF document text
    • http://dejogemo.22web.org/silane_coupling_agents_plueddemann.pdfIn PDF document text
    • http://aycotoro0.xyz/555091866270higm.pdfIn PDF document text
    • http://gawuguvososu.iblogger.org/relative_age_dating_of_geologic_features_answers.pdfIn PDF document text
    • http://vexeteseta.22web.org/are_icebreaker_mints_bad_for_you.pdfIn PDF document text
    • http://1xbet-registr.site/what_is_a_democracych84m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fdaf595b43f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fizanotafogibag.rf.gd/56547245591.pdfIn PDF document text
    • http://bubizimus.epizy.com/97693017914.pdfIn PDF document text
    • http://vonibuvet.rf.gd/musofi.pdfIn PDF document text
    • http://wutorokanotomav.onlinewebshop.net/what_did_the_social_contract_say.pdfIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_c651736717d2410e96eab6fb345e865c.pdf?index=trueIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_c0b71ea85cdb400e90757f461693d34e.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA6 5028 bytes
SHA-256: a57228c25175fa8f7d3e55d50ee8f93072d4ebae71f08388f47d28c0712343ad
font_01_sfnt_off00011fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBF 10940 bytes
SHA-256: 2f921a596ddd98a08d9c93f4ad6314b443e786cda7c8e984d603e95c4486b88d
font_02_sfnt_off00014499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14499 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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