Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a62bb107334f42…

MALICIOUS

PDF

78.8 KB Created: 2021-04-10 04:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3f00f9051cd4c2c94c4bce40fad5e4f5 SHA-1: 94e83496ce8d082f2147379db64bbd9e1807eb6c SHA-256: 76a62bb107334f42b38b6ad71c5e5cc6759f33dc9c7e62b3e53139223c168670
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a mass of external links, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_URI heuristic further support the attack pattern of directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=singer+heavy+duty+sewing+machine+4432+walmart PDF link annotation
    • https://cdn.sqhk.co/suxupijisajo/rhgii1R/the_last_stand_sabaton_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/novoganug/jgKhiIz/blacksad_juego_de_rol_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/he4icgh/52265854469.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/aBDfsii/aliexpress_new_user_coupon_not_working.pdfIn PDF document text
    • http://migipobazu.mypressonline.com/fuvovijutagugu.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/ggjhajd/frndly_tv_future_channels.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/m1jikog/miwanutivu.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/Igeiggi/beat_hazard_ultra_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dimusokobab/bjchjic/vurozoxejidevukinakado.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/capitalism_and_environment.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/i0jin90/64373574228.pdfIn PDF document text
    • https://cdn.sqhk.co/nilimijano/g2NVRQF/rukuzamatazuvitan.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/hcjbvhh/60652056149.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/IifuHhc/zgirls_2_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_7131e289575b49888c6c1f8a10d86bff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a8fed7-d471-4223-bb57-1368de635e76/importance_of_database_management_system.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_1cb55894846c452fa98f9398778ce92e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c249daf-29da-469f-8aeb-e8af115caf3b/mudulafedavogeratiwodoxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c403cdb8-9f6d-4c9a-874b-12254de549a9/is_the_bible_show_accurate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046c7fcd-f769-4b24-8129-6c5d696e7f7b/how_to_become_a_medical_laboratory_scientist.pdfIn PDF document text
    • https://d74058ad-8c31-4576-aeb4-582a73b10e1e.filesusr.com/ugd/666c83_b3e8eaa914a949d094a249698adb1c09.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E5 6092 bytes
SHA-256: 061b932e6efd7098fc6e53cac6b2bbf9c52c075c170c8ef938f53762750e8041
font_01_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 10584 bytes
SHA-256: 4a157a9320f1c5721e8a9d0aca8f25ca2d196dd985064c285bb12631cdefcf1f

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