Malicious PDF — malware analysis report

Static analysis result for SHA-256 baed0a8cc4958913…

MALICIOUS

PDF

76.4 KB Created: 2021-04-10 21:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0fd10f42f7879c822c8d7f0cdda9a7bb SHA-1: e468c4613e15f3fc9fc2b4934b1b25695af3ec15 SHA-256: baed0a8cc4958913324c7762cbb5a72e057a56e00840d710503d7337d51d3552
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://xezojetit.ru/strik?utm_term=starbucks+menu+prices+philippines+frappe PDF link annotation
    • http://kuroramogesok.iblogger.org/mapa_metro_roma_2018.pdfIn PDF document text
    • http://bixifofagowezi.22web.org/rogetot.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/konica_minolta_c258_brochure.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/skf_ball_bearing_dimensions.pdfIn PDF document text
    • http://notalebapol.iblogger.org/lagu_jin_bts_tonight.pdfIn PDF document text
    • http://jugepawe.medianewsonline.com/tawifukixajedodimesawi.pdfIn PDF document text
    • http://riwuvodobopexu.mywebcommunity.org/bronsted_theory_of_acids_and_bases.pdfIn PDF document text
    • http://famekeletiti.iblogger.org/31704842648.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/xulepiwa/after_effect_template_wedding.pdfIn PDF document text
    • http://kibajopowal.epizy.com/loluwoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/wabaxinu.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/wunubitufejeteluvoloxikir.pdfIn PDF document text
    • http://tujijekaxevon.rf.gd/architecture_books.pdfIn PDF document text
    • http://zedebegeku.myartsonline.com/alcatel_go_flip_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/where_is_the_royal_guards_chamber.pdfIn PDF document text
    • https://6f29901e-f5c9-4775-879c-97b2de5c8d5b.filesusr.com/ugd/0bf195_7108e5e1130e48b6a8725ac984c6a959.pdf?index=trueIn PDF document text
    • http://segurixuzek.myartsonline.com/nimexusiremeralonasego.pdfIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_405b687a3f43471e9a06f16763614109.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/programming_projects_for_python.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_9e5d9ad703914d6481855e5072e5750f.pdf?index=trueIn PDF document text
    • http://sabixukavizom.myartsonline.com/wigezimudexojovomuxamiruj.pdfIn PDF document text
    • http://fugufaza.myartsonline.com/angulos_na_circunferencia_exercicios.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_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 5560 bytes
SHA-256: adb752b00396696c8c8900f0c27a9710aec57d2d313d22ca3f2263a6521e2152
font_01_sfnt_off0000fc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC71 11240 bytes
SHA-256: be45f32324f8a33c8a17f1ffd7ca4c5061bddf4698bcb159cefc3285b4c42ee6

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