Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b37e4fca07f7fc9…

MALICIOUS

PDF

79.2 KB Created: 2021-03-22 10:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2091f1ad576ebf9082d5ffff106edb5b SHA-1: 14b9bb830866dd5bb41ae598cdb43421840a2320 SHA-256: 2b37e4fca07f7fc98d7f214e2305916b0640031cf1da955a478ff8cd319b92c0
126 Risk Score

Malware Insights

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

The PDF contains an embedded link that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though obfuscated, contains text related to a Bible quote, which is used as a lure.

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://zajinet.ru/strik?utm_term=where+in+the+bible+does+it+say+the+veil+was+torn
    • http://mamajan.space/michael_crichton_movies_ranked1m2wa.pdf
    • http://avbox.org/kodekloud_engineer_dashboard5cdps.pdf
    • http://formblckr1.xyz/hoja_de_vida_en_colombia_2019w70r5.pdf
    • http://xuritepizib.mygamesonline.org/asme_section_ix_2020.pdf
    • http://therarbooks.com/rupinder_gandhi_photos008ak.pdf
    • http://wuxapogetal.iblogger.org/stockfish_chess_engine_free.pdf
    • http://getizibibi.22web.org/grammaire_orthographe_franaise.pdf
    • http://kukushpa.fun/96676994739e9320.pdf
    • http://bibivire.mygamesonline.org/8717942407.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/20b5f47e-c057-4e41-933d-a19aa1cf4ce0/frigidaire_professional_fridge_ice_maker_not_working.pdf
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_b13b7540bc0f433cb0cc0290f7724128.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c6c06c51-2bcb-4a86-a0f1-f94a44166d71/king_oedipus_sophocles_analysis.pdf
    • http://punozow.epizy.com/mailgun_html_templates.pdf
    • http://wekiputozuda.epizy.com/41584613809.pdf
    • http://judumiji.epizy.com/data_analysis_using_sql.pdf
    • http://dovuxomumebajip.epizy.com/50597260904.pdf
    • http://lijomoxanegug.rf.gd/capsaicina_uso_topico.pdf
    • http://megegadimopef.rf.gd/renova_zero_mesh_pod_kit.pdf
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_b626b8faac88475486a163aaba3100d2.pdf?index=true
    • http://suvugadozomamu.rf.gd/computer_all_parts_name_list.pdf
    • https://uploads.strikinglycdn.com/files/35117095-5c18-42f2-ad83-5f5c10183f6c/kagoxulipovusirap.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f94d.bin
191adf4b7519b92fcab840453fe894a157f08abd2e7112f2c678eb24d6b10a1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF94D 5320 bytes
font_01_sfnt_off00010b76.bin
1b87751ba77fb3053c4953a920dd91215b0b724afb7acee04df41a8548f35a23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 10644 bytes

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